OK, UZ give us a bit more about your system & hardware informations. This seems to me an OS problem. I can TRY to figure out the reason, but I'll be needing those info. Defragment problem you having is pretty simple. There are some OR at least one program running in the background, while you do defrag. That's why every time Defrag encountars that program it gives you an error msg and stops. Just shut down your anti-virus, firewall etc etc before you defrag and it should do the job fine. Even though I hardly doubt defrag has anything to do with JPG option.