How to run checkdisk from recovery console (Windows xp).
[*]Insert the Windows XP startup disk into the floppy disk drive, or insert the Windows XP CD-ROM into the CD-ROM drive, and then restart the computer.
Note:Click to select any options that are required to start the computer from the CD-ROM drive if you are prompted to do so.
[*]When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
Note:If you have a dual-boot or multiple-boot computer, select the installation that you want to access from the Recovery Console.
[*]When you are prompted to do so, type the Administrator password. If the administrator password is blank, just press ENTER.
[*]At the Recovery Console command prompt, type the following then press Enter:

chkdsk /r

[*]Allow this to run UNDISTURBED until completed (45 min or so)
[*]Report any errors
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After that we may need to repair your windows xp install. Please let me know how it goes. I have several steps to offer after this is performed.