- Failure to activate with KMS within 30 days of installation

- Failure to renew activation with KMS within 210 days of previous activation

- Failure to renew activation with KMS within 30 days of hard drive replacement

2. A copy of Windows Vista may be required to reactivate for the following reasons, and failure to successfully reactivate during the 30-day grace period will cause the copy of Windows Vista to go into reduced functionality mode:

The activation process has been determined to have been tampered with or worked around, or other tampering of license files is detected.