Recovery console
http://support.microsoft.com/default.aspx?scid=kb;en-us;307654#3Then
After getting to the Recovery Console prompt, make certain that you are in the C:\Windows path for XP (assuming that XP is on C:, that Windows was installed into the \Windows directory, and that your hard disk is readable).
Change to your CD drive - by typing "D:", "E:" or "F:" etc. -- this varies per system but is most often:
D:
Change to i386 path by typing:
cd i386
Copy necessary files to root path (C: in this case) of winxp installation by typing:
copy ntldr C:
copy ntdetect.com C:
Change back to your windows path:
C:
cd windows
Attempt to fix the boot record:
fixboot c:
Try restarting machine - if still nothing - go back into recovery console by booting from cd Then run:
fixmbr c: