I routinely run a hardware diagnostic program on my HP computer that tests my hard drive with a Smart short self test. Recently, the short test will not complete. It stops at 19% and I get a message that the test is taking longer than usual. It never completes so i just stop the test. Is this an indication that something is going to go wrong with my HD or is it nothing to worry about. I don't notice anything unusual with my pc at the moment.