A few weeks ago, my sister's work laptop crashed and got itself into what is known as a boot loop, where it would start, present a menu and whatever choice was made, it would start Windows and then blue screen and restart to the same place. The Blue screen error was a code 24 which means NTFS disk fault, one of those errors that cannot be fixed by Windows itself and requires outside assistance.
I don't have my Windows XP CD with me (since Microsoft made the operating system obsolete in April 2014) but it turned out that I can boot from a Windows USB stick I bought from Amazon a few years ago. The repair process will also work with the DVD, so here goes:
bootsect.exe /nt52 C:
bootsect.exe /nt52 C: /mbr
chkdsk /f C:
Once you close the boxes and reboot, the computer may work properly.