Sorry sfc didn't work, I have another idea that should put cmd.exe back in the proper location taking the file directly from the XP CD.
Would you please put your XP CD in your CD drive, then restart? Please make sure that your CD drive is set to boot before your hard drive. You may have to go into CMOS Setup (BIOS) to change the boot order. It's usually under Advanced Options or Boot, or something similar. To get into CMOS Setup, there is a button you must press that is usually listed on the bottom of the screen while your computer is just starting up.
Once you boot from it, press R to enter the Recovery console. Once in it, please type the following, making sure to replace <CD-ROM:> with your drive letter, such as D:\ and please notice the space after expand and .ex_ . Good luck!expand <CD-ROM:>\i386\cmd.ex_ %systemroot%\system32\cmd.exe
Edit: Just noticed I forgot a %. Sorry.
Edited by Pi rules, 01 August 2006 - 07:15 AM.