I have an ASUS Smart Notebook UL30A purchased January 2010. This month, May 2012 I began receiving a notice after boot that my copy of Windows 7 (Home Premium) was invalid. This seemed impossible to me and I thought this notice was a part of some virus I may have received. I scanned but no virus was found. Then I did some research thinking if there was some undetected malware around some others would have it. I found only other PC users receiving a similar notice at various times over the past 2 years. This notice then seemed ligit so I proceeded to click on the notice and proceeded to enter the Product Key as asked. This did solve the problem but my question remains, WHY? Why after 2 and a half years did I get this notification? I have kept up with all updates and no notice with that sort of contact with MicroSoft... so, any ideas as to why this sort of notice suddenly appeared.?