You'll need to get hold of a USB floppy drive.
Download the Windows XP Setup Floppies from Microsoft. Use this link: http://support.microsoft.com/kb/310994/en-us
. Download the boot disks and copy them on to floppies.
Plug a USB floppy drive into your computer and boot from the floppy. Usually, just the presence of the drive (with the floppy installed) is enough to boot from floppy, but you may have to go into your computers BIOS Setup to choose a floppy boot. When the "Welcome to Setup" screen appears, press R to start the Recovery Console
. If you have a dual-boot or multiple-boot computer, select the installation that you must access from the Recovery Console. When you are prompted, type the Administrator password. If the administrator password is blank, just press ENTER.
Type: chkdsk /r
It's important to have a space before the "/".
To exit the Recovery Console and restart the computer, type exit
at the command prompt, and then press ENTER.