Is it possible that my computer can defrag for 3 days and still not be finished?

It's probably just not responding or something else has gone wrong. I would exit out the the defragger and download Auslogics disk defrag. It is much much faster than the defragger that comes with windows and it does an excellent job. Auslogics normally takes less than 30 minutes for most computers, less than 10 minutes on mine.

http://www.auslogics.com/disk-defrag

Normally if you do a lot of adding/deleting and editing files esp photos etc the drive tends to get fragmented very fast and warrants regular defrag. Also know that with the Windows program it needs a minimum of 15% free space and all other programs have to be turned off. Its likely that your drive is severely fragmented and you may be better off getting a better and faster defragger.

You could first run a diskcleanup, free up as much space then defrag using Diskeeper. Download the trial version and simply set it on automatic mode. It will defrag in the background even as you work.

The advantages are that it works even under low free space and the 09 edition is great at handling severe fragmentation.

http://www.diskeeper.com/defrag.aspx

Are you using Windows Defrag?

Try using JK-Defrag: http://www.filehippo.com/download_jkdefrag/

Hi, i wil restart computer and try it again, its not normal.good luck

one more thing, be sure your hard disk is not full, defragmentation need at least 10% free space on your hard drive(better 15%)

it sounds like it could have a virus.