Q. When I defragment my C drive, the graph goes only to 10 percent before I get a message that says the drive's content changed. How can I correct this problem? Q. When defragmenting, drive C gets to ...

Q. Often when I go to defrag my computer, I have to analyze the drive first to see if it needs to be defragged. Most of the time it says it doesn’t need to be. Is it OK to defrag anyway? Will it hurt ...