I've had this same problem on my computer with windows 98se and now with ME. Whenever I run the defrag program, it constantly says "Drive contents changed-restarting". And then it restarts the defrag program over . Sometimes it doesn't even get thru the preliminary checks before it does it again. I'm not doing anything except letting the defrag program run. what can be changing so much on the hard drive? Is there a program running in the back ground I should close?