Well it's come to the point where I think a reinstall is on the cards. Windows 7 is freezing constantly. All I know is that the hard drive indicator light goes solid green, the hard drive just spins for about 20-30 seconds, then the light goes off and I can hear the hard drive stop, then restart again. Windows is then usable for between a second and a minute before this happens again. I know it's not a hardware issue as I can use my dual-booting Ubuntu perfectly, that's what I've had to do for the last few weeks as Windows is totally unusable. Before I copy all my documents to a separate partition and reinstall Windows, is there anyone who has had this problem and knows if there is any way to fix it without a reinstall? And before anyone asks I've done multiple virus scans all coming back clear. Thanks for any help in advance!