LindaMay,
Have you tried following the procedures from the link below? Follow them step by step.:
What Do I Do When Scandisk and Defrag Won't Run In Win9.x/ME
Hope this helps.
Grif
I am soooo new this computing thing. When I try to run scan disk it says "Has tried to start scan disk so many times, blah blah blah. Now I can't run a defrag without first running a scan disk. Can anyone out there help me. This computer, I know, is so clogged up and I want to clean up this mess. HELP!!!! Thank you all so much.

Chowhound
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GameFAQs
GameSpot
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TechRepublic