If you are still running the Windows 7 Release Candidate (RC), beginning March 1, 2010, your PC will start to shut down every two hours in preparation for Windows 7 RC expiration on June 1, 2010. To avoid interruption, you will need to reinstall an earlier version of Windows, or the final, released to manufacturing (RTM) version of Windows 7.
To avoid data loss, read the Windows blog for more details on moving to a released version of Windows 7, and also see this Knowledge Base article.
More to come,
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