Fully Tested and Works on any PC. Updated 2011. You might not need it now. But save a copy just in case you need it someday.
Activation for Microsoft Products:
OS: Windows XP SP1, SP2, SP3/ Vista SP1,SP2/ Windows 7 (All Versions)
Suites: Office 2007 SP1, SP2 (All Versions), Office 2010
If you have a message that the windows is not genuine then go to Start> Control Panel> Uninstall Programs> Click on view installed updates> Uninstall KB971033 and Run the Activation Again.