hi guys, this windows not genuine thing kept popping up on my pc on boot up, now the mouse is unusable, I have an usb optical mouse, light comes on so I know the power is going to it ok. I bought this pc on gumtree about 2 years ago, it was a brand new build but I have no idea if the guy used a genuine copy of windows or not ( but I have a fair idea he didn't ). So question is guys, is there any way around this. Cheers guys