Are you using the new Windows 7 on beta on your computer? Then its time you should get some product keys which can make your application a legal version. You can download windows 7 directly and use it on your PC.
Here is the way to get windows 7 product keys :
The following steps worked for me:
1. Login in you Passport account, for example, here.
2. Without closing the Passport page, open one of the following in a new tab:
Windows 7 Beta 32-bit
Windows 7 Beta 64-bit
The 32-bit link may need to be refreshed many times, about 15 for me until it worked.
Are you a windows 7 user, then dont forget to let us know about your experiance using this operating system
and why you like/dislike it when compared to windows XP/Vista OS.