Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

Reactivating Computers

Periodically, Windows 7 and Windows Server 2008 R2 check the hardware configuration of the computer on which the operating system is installed. If the operating system detects that the hardware has changed substantially, reactivation is required. The actual weighting factors and threshold values vary, because these values must keep pace with the constantly evolving computer hardware market. KMS clients focus on hard disk changes to determine the need for reactivation.

Client activations are valid for 180 days—a period is called the activation validity interval. To remain activated, KMS clients must renew their activation by connecting to the KMS host at least once every 180 days. By default, KMS client computers attempt to renew their activation every seven days. After a client’s activation is renewed, the activation validity interval begins again.

Was this page helpful?
(1500 characters remaining)
Thank you for your feedback
© 2015 Microsoft