I have been attempting to defrag my hard drive for a few hours now and it wont get passed "checking for errors" and will jump from 3% back to 0% complete everytime. What can i do to complete defragmentation? Please Help!!

The most effective and quick way? Restart to Safe mode and run from there.

to restart in samemode press and hold Ctrl while restarting.

Not everyone has to run defrag in safe mode. You have some (other) thing(s) running in the background like anti-virus. Turn them off. RESOURCE: ScanDisk & Defrag/24474

Power Defrag 2.10 is a free program that allows the Windows defragger to run by itself with nothing else in the background: http://www.powerdefrag.com/

Thanks, I ran my defrag as regular maintenance last night and while it was checking for errors also, at 4% thought it would never get past same, thought I might start getting disk errors and about 4 months ago when I ran same, scandisk told me to run scandisk first. I did and it corrected the problem. Is this an indication, I am about to start getting errors on the drive!!!!!!!!!! Thanks!!!!!!!

Sorry guys, its 3 in the morning, my defrag prog told me to run scandisk first 4 months ago and it did correct problem. I did run scandisk before defrag this time!!!!!