Hariwin764,
While most people who tested Windows 7 have now moved to the final version, some are still running the Release Candidate. If you haven’t moved yet, it’s time to replace the RC. Starting on March 1, 2010 your PC will begin shutting down every two hours. Your work will not be saved during the shutdown. The Windows 7 RC will fully expire on June 1, 2010. In addition, your wallpaper will change to a solid black background with a persistent message on your desktop. You’ll also get periodic notifications that Windows isn’t genuine. That means your PC may no longer be able to obtain optional updates or downloads requiring genuine Windows validation. To avoid interruption, please reinstall a prior version of Windows or move to Windows 7. In either case, you’ll need to do a custom (clean) install to replace the RC. As with any clean installation, you’ll need to back up your data then reinstall your applications and restore the data. For more details about replacing the RC, see the Knowledge Base article KB 971767 available here:
http://support.microsoft.com/kb/971767. For more information, visit the Window 7 Forum available here:
http://social.technet.microsoft.com/Forums/en/category/w7itpro/ . Thanks again for helping us test Windows 7.
Jessica
Microsoft Windows Client Team