Read MoreMany people think that a hard drive defrag will make their PC run faster. Not so. It could kill your PC altogether, although this is unusual. Still, it's best to take precautions and understand why you are defragging your PC. Why defrag? The goal is efficiency. If you are defragmenting your computer for any other reason, then you've missed the point. We defrag a drive to make it more efficient.
But inefficient hard drives are not the only cause of a PC slowing down. Registry issues, bloatware, malware and just plain too much data can reduce a perfectly good PC to a dead crawl. So before you defrag your drive (which can take several hours) make sure that you have fixed other problems as well.