I have purchased a new p/c on oct-17-10 From nov-03-2010 is shows error message code 8004F807 I then noticed that in the bottom right hand corner of my desktop, I have a new tag: Windows 7 Evaluation copy. Build 7100 This copy of Windows is not genuine. It is asking me prodcut key what should i do. sachin

Hi, Your Windows 7 is not an official version and it already expired. Please install an official Windows 7. You can refer to http://support.microsoft.com/kb/971767 .