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Set-MpPreference

Last Updated: 3/8/2017

SYNOPSIS

Configures preferences for Windows Defender scans and updates.

SYNTAX

Set-MpPreference [-ExclusionPath <String[]>] [-ExclusionExtension <String[]>] [-ExclusionProcess <String[]>]
 [-RealTimeScanDirection <ScanDirection>] [-QuarantinePurgeItemsAfterDelay <UInt32>]
 [-RemediationScheduleDay <Day>] [-RemediationScheduleTime <DateTime>]
 [-ReportingAdditionalActionTimeOut <UInt32>] [-ReportingCriticalFailureTimeOut <UInt32>]
 [-ReportingNonCriticalTimeOut <UInt32>] [-ScanAvgCPULoadFactor <Byte>]
 [-CheckForSignaturesBeforeRunningScan <Boolean>] [-ScanPurgeItemsAfterDelay <UInt32>]
 [-ScanOnlyIfIdleEnabled <Boolean>] [-ScanParameters <ScanType>] [-ScanScheduleDay <Day>]
 [-ScanScheduleQuickScanTime <DateTime>] [-ScanScheduleTime <DateTime>] [-SignatureFirstAuGracePeriod <UInt32>]
 [-SignatureAuGracePeriod <UInt32>] [-SignatureDefinitionUpdateFileSharesSources <String>]
 [-SignatureDisableUpdateOnStartupWithoutEngine <Boolean>] [-SignatureFallbackOrder <String>]
 [-SignatureScheduleDay <Day>] [-SignatureScheduleTime <DateTime>] [-SignatureUpdateCatchupInterval <UInt32>]
 [-SignatureUpdateInterval <UInt32>] [-MAPSReporting <MAPSReportingType>]
 [-SubmitSamplesConsent <SubmitSamplesConsentType>] [-DisableAutoExclusions <Boolean>]
 [-DisablePrivacyMode <Boolean>] [-RandomizeScheduleTaskTimes <Boolean>] [-DisableBehaviorMonitoring <Boolean>]
 [-DisableIntrusionPreventionSystem <Boolean>] [-DisableIOAVProtection <Boolean>]
 [-DisableRealtimeMonitoring <Boolean>] [-DisableScriptScanning <Boolean>] [-DisableArchiveScanning <Boolean>]
 [-DisableCatchupFullScan <Boolean>] [-DisableCatchupQuickScan <Boolean>] [-DisableEmailScanning <Boolean>]
 [-DisableRemovableDriveScanning <Boolean>] [-DisableRestorePoint <Boolean>]
 [-DisableScanningMappedNetworkDrivesForFullScan <Boolean>] [-DisableScanningNetworkFiles <Boolean>]
 [-UILockdown <Boolean>] [-ThreatIDDefaultAction_Ids <Int64[]>]
 [-ThreatIDDefaultAction_Actions <ThreatAction[]>] [-UnknownThreatDefaultAction <ThreatAction>]
 [-LowThreatDefaultAction <ThreatAction>] [-ModerateThreatDefaultAction <ThreatAction>]
 [-HighThreatDefaultAction <ThreatAction>] [-SevereThreatDefaultAction <ThreatAction>] [-Force]
 [-DisableBlockAtFirstSeen <Boolean>] [-PUAProtection <PUAProtectionType>] [-CimSession <CimSession[]>]
 [-ThrottleLimit <Int32>] [-AsJob] [<CommonParameters>]

DESCRIPTION

The Set-MpPreference cmdlet configures preferences for Windows Defender scans and updates. You can modify exclusion file name extensions, paths, or processes, and specify the default action for high, moderate, and low threat levels.

EXAMPLES

Example 1: Schedule to check for definition updates everyday

PS C:\> Set-MpPreference -SignatureScheduleDay Everyday

This command configures preferences to check for definition updates every day.

Example 2: Schedule a time of day to check for definition updates

PS C:\> Set-MpPreference -SignatureScheduleTime 120

This command configures preferences to check for definition updates 120 minutes after midnight on days when it is scheduled to check.

PARAMETERS

-AsJob

Runs the cmdlet as a background job. Use this parameter to run commands that take a long time to complete.

The cmdlet immediately returns an object that represents the job and then displays the command prompt. You can continue to work in the session while the job completes. To manage the job, use the *-Job cmdlets. To get the job results, use the Receive-Job cmdlet.

For more information about Windows PowerShell background jobs, see about_Jobs.

Type: SwitchParameter
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-CheckForSignaturesBeforeRunningScan

Indicates whether to check for new virus and spyware definitions before Windows Defender runs a scan. If you specify a value of $True, Windows Defender checks for new definitions. If you specify $False or do not specify a value, the scan begins with existing definitions. This value applies to scheduled scans and to scans that you start from the command line, but it does not affect scans that you start from the user interface.

Type: Boolean
Parameter Sets: (All)
Aliases: csbr

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-CimSession

Runs the cmdlet in a remote session or on a remote computer. Enter a computer name or a session object, such as the output of a New-CimSession or Get-CimSession cmdlet. The default is the current session on the local computer.

Type: CimSession[]
Parameter Sets: (All)
Aliases: Session

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableArchiveScanning

Indicates whether to scan archive files, such as .zip and .cab files, for malicious and unwanted software. If you specify a value of $True or do not specify a value, Windows Defender scans archive files.

Type: Boolean
Parameter Sets: (All)
Aliases: darchsc

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableAutoExclusions

Indicates whether to disable the Automatic Exclusions feature for the server.

Type: Boolean
Parameter Sets: (All)
Aliases: dae

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableBehaviorMonitoring

Indicates whether to enable behavior monitoring. If you specify a value of $True or do not specify a value, Windows Defender enables behavior monitoring.

Type: Boolean
Parameter Sets: (All)
Aliases: dbm

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableBlockAtFirstSeen

Type: Boolean
Parameter Sets: (All)
Aliases: dbaf

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableCatchupFullScan

Indicates whether Windows Defender runs catch-up scans for scheduled full scans. A computer can miss a scheduled scan, usually because the computer is turned off at the scheduled time. If you specify a value of $True, after the computer misses two scheduled full scans, Windows Defender runs a catch-up scan the next time someone logs on to the computer. If you specify a value of $False or do not specify a value, the computer does not run catch-up scans for scheduled full scans.

Type: Boolean
Parameter Sets: (All)
Aliases: dcfsc

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableCatchupQuickScan

Indicates whether Windows Defender runs catch-up scans for scheduled quick scans. A computer can miss a scheduled scan, usually because the computer is off at the scheduled time. If you specify a value of $True, after the computer misses two scheduled quick scans, Windows Defender runs a catch-up scan the next time someone logs onto the computer. If you specify a value of $False or do not specify a value, the computer does not run catch-up scans for scheduled quick scans.

Type: Boolean
Parameter Sets: (All)
Aliases: dcqsc

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableEmailScanning

Indicates whether Windows Defender parses the mailbox and mail files, according to their specific format, in order to analyze mail bodies and attachments. Windows Defender supports several formats, including .pst, .dbx, .mbx, .mime, and .binhex. If you specify a value of $True, Windows Defender performs email scanning. If you specify a value of $False or do not specify a value, Windows Defender does not perform email scanning.

Type: Boolean
Parameter Sets: (All)
Aliases: demsc

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableIOAVProtection

Indicates whether Windows Defender scans all downloaded files and attachments. If you specify a value of $True or do not specify a value, scanning downloaded files and attachments is enabled.

Type: Boolean
Parameter Sets: (All)
Aliases: dioavp

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableIntrusionPreventionSystem

Indicates whether to configure network protection against exploitation of known vulnerabilities. If you specify a value of $True or do not specify a value, network protection is enabled.

Type: Boolean
Parameter Sets: (All)
Aliases: dips

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisablePrivacyMode

Indicates whether to disable privacy mode. Privacy mode prevents users, other than administrators, from displaying threat history.

Type: Boolean
Parameter Sets: (All)
Aliases: dpm

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableRealtimeMonitoring

Indicates whether to use real-time protection. If you specify a value of $True or do not specify a value, Windows Defender uses real-time protection. We recommend that you enable Windows Defender to use real-time protection.

Type: Boolean
Parameter Sets: (All)
Aliases: drtm

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableRemovableDriveScanning

Indicates whether to scan for malicious and unwanted software in removable drives, such as flash drives, during a full scan. If you specify a value of $True, Windows Defender scans removable drives during any type of scan. If you specify a value of $False or do not specify a value, Windows Defender does not scan removable drives during a full scan. Windows Defender can still scan removable drives during quick scans or custom scans.

Type: Boolean
Parameter Sets: (All)
Aliases: drdsc

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableRestorePoint

Indicates whether to disable scanning of restore points.

Type: Boolean
Parameter Sets: (All)
Aliases: drp

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableScanningMappedNetworkDrivesForFullScan

Indicates whether to scan mapped network drives. If you specify a value of $True, Windows Defender scans mapped network drives. If you specify a value of $False or do not specify a value, Windows Defender does not scan mapped network drives.

Type: Boolean
Parameter Sets: (All)
Aliases: dsmndfsc

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableScanningNetworkFiles

Indicates whether to scan for network files. If you specify a value of $True, Windows Defender scans network files. If you specify a value of $False or do not specify a value, Windows Defender does not scan network files. We do not recommend that you scan network files.

Type: Boolean
Parameter Sets: (All)
Aliases: dsnf

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-DisableScriptScanning

Specifies whether to disable the scanning of scripts during malware scans.

Type: Boolean
Parameter Sets: (All)
Aliases: dscrptsc

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ExclusionExtension

Specifies an array of file name extensions, such as obj or lib, to exclude from scheduled, custom, and real-time scanning.

Type: String[]
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ExclusionPath

Specifies an array of file paths to exclude from scheduled and real-time scanning. You can specify a folder to exclude all the files under the folder.

Type: String[]
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ExclusionProcess

Specifies an array of processes, as paths to process images. This cmdlet excludes any files opened by the processes that you specify from scheduled and real-time scanning. Specifying this parameter excludes files opened by executable programs only. The cmdlet does not exclude the processes themselves. To exclude a process, specify it by using the ExclusionPath parameter.

Type: String[]
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-Force

Forces the command to run without asking for user confirmation.

Type: SwitchParameter
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-HighThreatDefaultAction

Specifies which automatic remediation action to take for a high level threat. The acceptable values for this parameter are:

  • Quarantine
  • Remove
  • Ignore
Type: ThreatAction
Parameter Sets: (All)
Aliases: htdefac
Accepted values: Clean, Quarantine, Remove, Allow, UserDefined, NoAction, Block

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-LowThreatDefaultAction

Specifies which automatic remediation action to take for a low level threat. The acceptable values for this parameter are:

  • Quarantine
  • Remove
  • Ignore
Type: ThreatAction
Parameter Sets: (All)
Aliases: ltdefac
Accepted values: Clean, Quarantine, Remove, Allow, UserDefined, NoAction, Block

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-MAPSReporting

Specifies the type of membership in Microsoft Active Protection Service. Microsoft Active Protection Service is an online community that helps you choose how to respond to potential threats. The community also helps prevent the spread of new malicious software. The acceptable values for this parameter are:

  • 0: Disabled. Send no information to Microsoft. This is the default value.
  • 1: Basic membership. Send basic information to Microsoft about detected software, including where the software came from, the actions that you apply or that apply automatically, and whether the actions succeeded.
  • 2: Advanced membership. In addition to basic information, send more information to Microsoft about malicious software, spyware, and potentially unwanted software, including the location of the software, file names, how the software operates, and how it affects your computer.

If you join this community, you can choose to automatically send basic or additional information about detected software. Additional information helps Microsoft create new definitions. In some instances, personal information might unintentionally be sent to Microsoft. However, Microsoft will not use this information to identify you or contact you.

Type: MAPSReportingType
Parameter Sets: (All)
Aliases: 
Accepted values: Disabled, Basic, Advanced

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ModerateThreatDefaultAction

Specifies which automatic remediation action to take for a moderate level threat. The acceptable values for this parameter are:

  • Quarantine
  • Remove
  • Ignore
Type: ThreatAction
Parameter Sets: (All)
Aliases: mtdefac
Accepted values: Clean, Quarantine, Remove, Allow, UserDefined, NoAction, Block

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-PUAProtection

Type: PUAProtectionType
Parameter Sets: (All)
Aliases: 
Accepted values: Disabled, Enabled, AuditMode

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-QuarantinePurgeItemsAfterDelay

Specifies the number of days to keep items in the Quarantine folder. If you specify a value of zero or do not specify a value for this parameter, items stay in the Quarantine folder indefinitely.

Type: UInt32
Parameter Sets: (All)
Aliases: qpiad

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-RandomizeScheduleTaskTimes

Indicates whether to select a random time for the scheduled start and scheduled update for definitions. If you specify a value of $True or do not specify a value, scheduled tasks begin within 30 minutes, before or after, the scheduled time. If you randomize the start times, it can distribute the impact of scanning. For example, if several virtual machines share the same host, randomized start times prevents all the hosts from starting the scheduled tasks at the same time.

Type: Boolean
Parameter Sets: (All)
Aliases: rstt

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-RealTimeScanDirection

Specifies scanning configuration for incoming and outgoing files on NTFS volumes. The acceptable values for this parameter are:

  • 0: Scan both incoming and outgoing files. This is the default.
  • 1: Scan incoming files only.
  • 2: Scan outgoing files only.

Specify a value for this parameter to enhance performance on servers which have a large number of file transfers, but need scanning for either incoming or outgoing files. Evaluate this configuration based on the server role. For non-NTFS volumes, Windows Defender performs full monitoring of file and program activity.

Type: ScanDirection
Parameter Sets: (All)
Aliases: rtsd
Accepted values: Both, Incoming, Outcoming

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-RemediationScheduleDay

Specifies the day of the week on which to perform a scheduled full scan in order to complete remediation. Alternatively, specify everyday for this full scan or never. The acceptable values for this parameter are:

  • 0: Everyday
  • 1: Sunday
  • 2: Monday
  • 3: Tuesday
  • 4: Wednesday
  • 5: Thursday
  • 6: Friday
  • 7: Saturday
  • 8: Never

The default value is 8, never. If you specify a value of 8 or do not specify a value, Windows Defender performs a scheduled full scan to complete remediation by using a default frequency.

Type: Day
Parameter Sets: (All)
Aliases: rsd
Accepted values: Everyday, Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Never

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-RemediationScheduleTime

Specifies the time of day, as the number of minutes after midnight, to perform a scheduled scan. The time refers to the local time on the computer. If you do not specify a value for this parameter, a scheduled scan runs at the default time of two hours after midnight.

Type: DateTime
Parameter Sets: (All)
Aliases: rst

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ReportingAdditionalActionTimeOut

Specifies the number of minutes before a detection in the additional action state changes to the cleared state.

Type: UInt32
Parameter Sets: (All)
Aliases: raat

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ReportingCriticalFailureTimeOut

Specifies the number of minutes before a detection in the critically failed state changes to either the additional action state or the cleared state.

Type: UInt32
Parameter Sets: (All)
Aliases: rcto

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ReportingNonCriticalTimeOut

Specifies the number of minutes before a detection in the non-critically failed state changes to the cleared state.

Type: UInt32
Parameter Sets: (All)
Aliases: rncto

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ScanAvgCPULoadFactor

Specifies the maximum percentage CPU usage for a scan. The acceptable values for this parameter are: integers from 5 through 100, and the value 0, which disables CPU throttling. Windows Defender does not exceed the percentage of CPU usage that you specify. The default value is 50.

Type: Byte
Parameter Sets: (All)
Aliases: saclf

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ScanOnlyIfIdleEnabled

Indicates whether to start scheduled scans only when the computer is not in use. If you specify a value of $True or do not specify a value, Windows Defender runs schedules scans when the computer is on, but not in use.

Type: Boolean
Parameter Sets: (All)
Aliases: soiie

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ScanParameters

Specifies the scan type to use during a scheduled scan. The acceptable values for this parameter are:

  • 1: Quick scan
  • 2: Full scan

If you do not specify this parameter, Windows Defender uses the default value of quick scan.

Type: ScanType
Parameter Sets: (All)
Aliases: 
Accepted values: QuickScan, FullScan

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ScanPurgeItemsAfterDelay

Specifies the number of days to keep items in the scan history folder. After this time, Windows Defender removes the items. If you specify a value of zero, Windows Defender does not remove items. If you do not specify a value, Windows Defender removes items from the scan history folder after the default length of time, which is 30 days.

Type: UInt32
Parameter Sets: (All)
Aliases: spiad

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ScanScheduleDay

Specifies the day of the week on which to perform a scheduled scan. Alternatively, specify everyday for a scheduled scan or never. The acceptable values for this parameter are:

  • 0: Everyday
  • 1: Sunday
  • 2: Monday
  • 3: Tuesday
  • 4: Wednesday
  • 5: Thursday
  • 6: Friday
  • 7: Saturday
  • 8: Never

The default value is 8, never. If you specify a value of 8 or do not specify a value, Windows Defender does not perform scheduled scans.

Type: Day
Parameter Sets: (All)
Aliases: scsd
Accepted values: Everyday, Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Never

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ScanScheduleQuickScanTime

Specifies the time of day, as the number of minutes after midnight, to perform a scheduled quick scan. The time refers to the local time on the computer. If you do not specify a value for this parameter, a scheduled quick scan runs at the time specified by the ScanScheduleTime parameter. That parameter has a default time of two hours after midnight.

Type: DateTime
Parameter Sets: (All)
Aliases: scsqst

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ScanScheduleTime

Specifies the time of day, as the number of minutes after midnight, to perform a scheduled scan. The time refers to the local time on the computer. If you do not specify a value for this parameter, a scheduled scan runs at a default time of two hours after midnight.

Type: DateTime
Parameter Sets: (All)
Aliases: scst

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-SevereThreatDefaultAction

Specifies which automatic remediation action to take for a severe level threat. The acceptable values for this parameter are:

  • Quarantine
  • Remove
  • Ignore
Type: ThreatAction
Parameter Sets: (All)
Aliases: stdefac
Accepted values: Clean, Quarantine, Remove, Allow, UserDefined, NoAction, Block

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-SignatureAuGracePeriod

Specifies a grace period, in minutes, for the definition. If a definition successfully updates within this period, Windows Defender abandons any service initiated updates.

Type: UInt32
Parameter Sets: (All)
Aliases: sigagp

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-SignatureDefinitionUpdateFileSharesSources

Specifies file-share sources for definition updates. Specify sources as a bracketed sequence of Universal Naming Convention (UNC) locations, separated by the pipeline symbol; for example, { \\Server01\Share01 | \\Server02\Share02 | \\Server03\Share03}. If you specify a value for this parameter, Windows Defender attempts to connect to the shares in the order that you specify. After Windows Defender updates a definition, it stops attempting to connect to shares on the list. If you do not specify a value for this parameter, the list is empty.

Type: String
Parameter Sets: (All)
Aliases: sigdufss

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-SignatureDisableUpdateOnStartupWithoutEngine

Indicates whether to initiate definition updates even if no antimalware engine is present. If you specify a value of $True or do not specify a value, Windows Defender initiates definition updates on startup. If you specify a value of $False, and if no antimalware engine is present, Windows Defender does not initiate definition updates on startup.

Type: Boolean
Parameter Sets: (All)
Aliases: sigduoswo

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-SignatureFallbackOrder

Specifies the order in which to contact different definition update sources. Specify the types of update sources in the order in which you want Windows Defender to contact them, enclosed in braces and separated by the pipeline symbol; for example, { InternalDefinitionUpdateServer | MicrosoftUpdateServer | MMPC }. The values that you can specify in the string are:

  • InternalDefinitionUpdateServer
  • MicrosoftUpdateServer
  • MMPC
  • FileShares

MMPC refers to Microsoft Malware Protection Center.

If you specify a value for this parameter, Windows Defender contacts the definition update sources in the specified order. After Windows Defender downloads definition updates from a source, it stops attempting to connect to other sources. If you do not specify a value for this parameter, Windows Defender contacts sources in the default order of { MicrosoftUpdateServer | MMPC }.

Type: String
Parameter Sets: (All)
Aliases: sfo

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-SignatureFirstAuGracePeriod

Specifies a grace period, in minutes, for the definition. If a definition successfully updates within this period, Windows Defender abandons any service initiated updates. This parameter overrides the value of the CheckForSignaturesBeforeRunningScan parameter.

Type: UInt32
Parameter Sets: (All)
Aliases: sigfagp

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-SignatureScheduleDay

Specifies the day of the week on which to check for definition updates. Alternatively, specify everyday for a scheduled scan or never. The acceptable values for this parameter are:

  • 0: Everyday
  • 1: Sunday
  • 2: Monday
  • 3: Tuesday
  • 4: Wednesday
  • 5: Thursday
  • 6: Friday
  • 7: Saturday
  • 8: Never

The default value is 8, never. If you specify a value of 8 or do not specify a value, Windows Defender checks for definition updates by using a default frequency.

Type: Day
Parameter Sets: (All)
Aliases: sigsd
Accepted values: Everyday, Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Never

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-SignatureScheduleTime

Specifies the time of day, as the number of minutes after midnight, to check for definition updates. The time refers to the local time on the computer. If you do not specify a value for this parameter, Windows Defender checks for definition updates at the default time of 15 minutes before the scheduled scan time.

Type: DateTime
Parameter Sets: (All)
Aliases: sigst

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-SignatureUpdateCatchupInterval

Specifies the number of days after which Windows Defender requires a catch-up definition update. If you do not specify a value for this parameter, Windows Defender requires a catch-up definition update after the default value of one day.

Type: UInt32
Parameter Sets: (All)
Aliases: siguci

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-SignatureUpdateInterval

Specifies the interval, in hours, at which to check for definition updates. The acceptable values for this parameter are: integers from 1 through 24. If you do not specify a value for this parameter, Windows Defender checks at the default interval. You can use this parameter instead of the SignatureScheduleDay parameter and SignatureScheduleTime parameter.

Type: UInt32
Parameter Sets: (All)
Aliases: sigui

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-SubmitSamplesConsent

Specifies how Windows Defender checks for user consent for certain samples. If consent has previously been granted, Windows Defender submits the samples. Otherwise, if the MAPSReporting parameter does not have a value of Disabled, Windows Defender prompts the user for consent. The acceptable values for this parameter are:

  • 0: Always prompt
  • 1: Send safe samples automatically
  • 2: Never send
  • 3: Send all samples automatically
Type: SubmitSamplesConsentType
Parameter Sets: (All)
Aliases: 
Accepted values: None, Always, Never

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ThreatIDDefaultAction_Actions

Specifies an array of the actions to take for the IDs specified by using the ThreatIDDefaultAction_Ids parameter. The acceptable values for this parameter are:

  • 1: Clean
  • 2: Quarantine
  • 3: Remove
  • 4: Allow
  • 8: UserDefined
  • 9: NoAction
  • 10: Block
Type: ThreatAction[]
Parameter Sets: (All)
Aliases: tiddefaca
Accepted values: Clean, Quarantine, Remove, Allow, UserDefined, NoAction, Block

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ThreatIDDefaultAction_Ids

Specifies an array of threat IDs. This cmdlet modifies the default action for the threat IDs that you specify.

Type: Int64[]
Parameter Sets: (All)
Aliases: tiddefaci

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ThrottleLimit

Specifies the maximum number of concurrent operations that can be established to run the cmdlet. If this parameter is omitted or a value of 0 is entered, then Windows PowerShell® calculates an optimum throttle limit for the cmdlet based on the number of CIM cmdlets that are running on the computer. The throttle limit applies only to the current cmdlet, not to the session or to the computer.

Type: Int32
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-UILockdown

Indicates whether to disable UI lockdown mode. If you specify a value of $True, Windows Defender disables UI lockdown mode. If you specify $False or do not specify a value, UI lockdown mode is enabled.

Type: Boolean
Parameter Sets: (All)
Aliases: 

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-UnknownThreatDefaultAction

Specifies which automatic remediation action to take for an unknown level threat. The acceptable values for this parameter are:

  • Quarantine
  • Remove
  • Ignore
Type: ThreatAction
Parameter Sets: (All)
Aliases: unktdefac
Accepted values: Clean, Quarantine, Remove, Allow, UserDefined, NoAction, Block

Required: False
Position: Named
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

CommonParameters

This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters.

INPUTS

OUTPUTS

NOTES

Add-MpPreference

Get-MpPreference

Remove-MpPreference

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