OK, my system sometimes locks up while playing games, and every time this happens, windows insists on scanning the drive. It says "Press any key to skip this", although when I press a key nothing happens, then it starts the scan which can take a while. How do I turn this feature off? Thanks.

Do not diasble are cancel scan disk, it's there for a reason and a good 1. It physically scans your hard drive to see if it is damaged and needs repairing. If your PC is freezing up, it could just need a defrag, if you've never done this your PC will be slow as, you could have sum bots & or Virus's.

Scan you PC to make sure and REMEMBER to DEFRAG!!