had my HD replaced last year, and Windows (98SE) reinstalled by a company. 2 or 3 months later, I tried to do a de-frag, and it told me "unable to run defrag" since then, I discovered scandisk has also refused to run...

I will try a couple of the workarounds noted soon...(AFTER the 7th of June, as I do not have 20 hours to devote to defrag right now..*wry grin*)