When I defrag my C drive, it doesn't defrag completely. After I defrag, I analyze the drive and it says I need to defrag. There are some files that are listed as not defragged. My computer used to defrag completely. Not anymore. If anybody has a suggestion, I would appreciate the input.
I don't knowf this has been moved but..If you drive won't defrag I would make a backup of anything you really need and get ready to replace the hard drive
If you have only 10%-15% hard drive space available, you may not be able to defrag the drive. A great defragging program is Diskeeper. It will defrag drives that have very little room on them, but if you are low on space, it is time to get a larger hard drive.