Hi, This just started to happen yesterday, after 2 and half years of use: There is a pop-up that claims that "this computer is not running genuine Windows" But, if I go to Computer/properties there is: Windows activation Windows is activated Product ID: xxxxx-OEM-xxxxxxx-xxxxx If I click "resolve online"...the offered solution is to buy win7. Running win7 64-bit in a lappy. And it has been crashing lately quite often...and there might be some issues on the disk. When booting there is a suggestion to run chkdsk, but it seems not to go anywhere ie. is slooooooooooooow. Once let it run for few hours and it only got to something like 7%...and it got to that before it started getting slow. Is there any other way to try to solve this, or should I just wait for few weeks while chkdsk runs? Is my windows going to stop working because of this?