I needed to remove windows 7 from my harddrive in order to revert to windows xp.  I formatted the drive ntfs, and upon attempting to install I get an error message "0x0000007B ..."

The process hangs before I can ever get into windows, but after files are loaded and appear to be installed. 

Looking that up, one of the suggestions is that the Mass Storage hardware controller is bad or the XP disc doesn't have the correct one.  

Does anyone have any insight into this?  I'm not sure where to get the missing file, and I don't know much about this system.  It was handed to me to fix at a new position.

Thank you in advance.