Bob...I think if it was me,i would use the recovery cd if you have one.
At the moment,i cannot find any reference to the error code you are receiving,but will try and find some info.
Maybe running ewido click here to tidy up and scan for spyware/malware etc.Also try running ccleaner click here to clean your the system.
Then run regscrubxp click here
And see how you get on,im not saying this will cure your problem,but may help you.It dosnt sound like the guy you sent the system to has a done a reliable job.Try these idea's and post back.