When my XP reboots (once a day, to accommodate Windows updates) it has, recently, taken to stopping somewhere in the pre-Windows phase, telling me that my disc is BAD. If I press F2 I get to another non-Windows screen, which leads to another, which takes a terribly long time but eventually gets to the Windows log-in page. I have investigated my disc with chkdsk and found it faultless. So why is the boot program finding an error, how can I detect that error, and what should I do about it?
