I've been using SQL SERVER 2008 on a Windows 7 computer for over 6 months now without incident. Yesterday when I went to open it I received the following message: "Evaluation Period has expired. For information on how to upgrade your evaluation software. Please goto http://www.microsoft.com/sql/howtobuy
I have no idea why this is happening. The program came from MSDN and is being used successfully by other members of our staff.
I uninstalled it, then re-installed it but the result was the same.