Check if the drive is running out of disk space. If this is true, free some space to allow defragmentation. Check also, if the defragger is hanging on a certain file. Is this file exclusively locked by another application? Or are other applications running at all, e.g. a virus scanner. Shut down all applications before running the defragger. If this still does not help, try another defrag software to check if you have a problem with your system or if the built-in defragger has a problem.
There are several third-party defraggers available as trial versions on the Net. Download, install and go ahead!
This was first published in March 2002