I am running an actual legal copy of a beta version of .net that is build 3590 that was given to me by a friend that works for Microsoft. He gave me a product key and the original disk that was supposed to activate it indefinitely I thought. Since that time we have parted ways and now when I try to log in I get an error, "A problem is preventing Windows from accurately checking the license for this computer." Should I try and get a hold of build 3689 to upgrade it and will it let me do this or what can I do. It will not even let me log in, so my options may be limited. Any help is greatly appreciated.

legal or not legal copy as long as you have your own key you could try all versions and it will be activated just fine.i got a key from ms for 3663 and i have activated legaly 3676 ,3681,3689 and still working fine.did you mes up with the product activation key if so try to reinstall and dont worry about activation ,you will be able to activate it.

Thanks for the reply fares. I guess it has already been 180 days since I first loaded it. I will just try and get my fingers on the latest release and see if I can't just update it using my key. Thanks again.