Hoyter52,
This error code indicates a Memory error as does all the other problems you have been having. The only way you are going to get this back up and going is to fix the memory error in the system.
You could try to reseat the memory chips, take the chips out, clean the contacts with an eraser and put it back in. If that does not work you will have to purchase new ram or start a warranty process with HP if your system is still covered.
Running a system with memory errors for any length of time is not a good idea. It has a tendency to corrupt info on the hard drive.
-Fred