My uncle has a vista machine and he is having a problem were it randomly freezes up. He downloaded spyboot to scan for spyware and it will get between 25-70% done than it freezes and you are unble to do anythin ctrl alt del does not work to bring up task manager. You have to physically turn the computer off by pressing the power button. Now when it boots up sometimes it will boot into a blue screen and sometimes it shows a screen that says insert boot disk. Now if you leave the computer off for about an hour it boots right into windows without a hitch. Anyone have any suggestions as to what could be causing this?