Continue with these instructions:
Go to Start, Run, type chkdsk /f /r then press enter, type Y to confirm for next boot, press enter then reboot.
Windows will appear to load normally, then the monitor will show progress of the scan, rather than going to Windows. Do not disturb this. This will take an hour or so before it gets to the desktop.
And if that doesn't work:
Repair Windows XP. You will need an XP CD in order to do this. If you're not sure how to do a repair, check out the following link: http://www.geekstogo...ws-XP-t138.html
Make sure you follow the directions at that link EXACTLY. If you do not, you may accidentally format and reinstall Windows, thus losing all your data! There are pictures to help confirm you are proceeding correctly.
If you have problems, here is an alternate way to repair XP:
Alternate XP Repair Method
Windows XP repair feature won't delete your data, installed programs, personal information, or settings. It just repairs the operating system. After running XP Repair you will need to install all Windows Updates and possibly your video card driver.