If you are still using Windows 7 Release Candidate then here is a Important Notice for you.On 15 Feb. 2010 you will get a notification message that from March 1 2010 your PC will begin experiencing bi-hourly shutdowns. These shutdowns will continue through June 1st, 2010.
On June 1st, 2010, a non-genuine experience is triggered where your wallpaper is removed and “This copy of Windows is not genuine” will be displayed in the lower right corner above the taskbar. This means your PC will no longer be able to obtain optional updates or downloads that require genuine Windows validation.
To avoid any data loss, we advise you to move to a released version of Windows 7 before the automatic shutdowns start. During these shutdowns, your work will not be saved.
If you need more time to test your application and hardware compatibility in Windows 7? If so, the Windows 7 Enterprise 90-day Trial provides a great opportunity for IT Pros to finish critical testing with a full version of Windows 7 Enterprise.