Registry Key Exists Rule
The Registry Key Exists basic rule in System Center Updates Publisher is used when creating or modifying software update definitions. A specific registry key is verified with what is found on a scanned computer. If the rule does not pass verification, the software update is considered not needed, not applicable, or not installed on the computer. The Registry Key Exists rule has the following configuration settings:
Registry Path: Specifies the path to a registry key. For example, HKEY_LOCAL_MACHINE\Software\MyCompany\MyTool\Mykey. This is a required field.
Use 32-bit Registry: Specifies whether registry hive detection will always occur in 32-bit or determine whether the computer is 64-bit or 32-bit and detect the registry hive accordingly. By default, the Use 32-bit check box is not enabled and both 64-bit and 32-bit registry detection are supported.