XP will not start after running combofix.exe in XP Cleaning Procedure

I had a persistent problem with this: "Malware.Trace from HKEY_Local_Machine\Software\Microsoft\WindowsNT\CurrentVersion\Network\UID, Unable to remove Malware.Trace from UID registry". It kept returning immediately after each Mbam scan.

I decided to run the Windows XP Cleaning Procedure as detailed here on Mbam and followed READ & RUN and everything else step-by-step.

After completing the procedure for combofix.exe and the resulting restart, the computer will not start properly, not even in safe mode. I get as far as the Windows user name and password prompt, click ok, my wallpaper loads and then nothing else.

When trying Windows Recovery Console a message reads: "Windows could not start because of a computer disk hardware configuration problem.

Could not read from the selected boot disk. Check boot path and disk hardware.

Please check the Windows documentation about hardware disk configuration and your hardware reference manuals for additional information."

Any help would be greatly appreciated. Thanks