I recently installed (not upgrade from XP) Windows Vista Ultimate (not sp1). I am running it on a 32-bit system or x32. When I looked in System under Control Panel, I saw that it still needed to be activated so I clicked the link for activation. However, it said that my key was invalid and gave me options to purchase. I became very confused so I went to Windows Genuine Advantage to check if my Windows was genuine. It passed the test and yet I can't activate. Please help and thanks in advance.