About a week ago we were having electrical problems (A donkey ran into the ground wire, for those of you that have to know). The electricity began flashing on and off and my computer would only boot in safe mode. I ran a test with PC-Doctor and my hard drive failed the short self test, error code HD521-2W. Today the hard drive that HP sent me arrived and I was seeing what I could do before installing the other hard drive. I used system recovery to reset the computer back to before the electrical problems. System recovery completed and the computer started up just fine. I ran a test on the hard drive in PC-Doctor and it still failed the short self test. Is there any way to fix this or do I need to go ahead and switch over to the other hard drive?