Assuming Win-XP, hit Start Button, Run.
Copy and paste the following into the run box.
CHKDSK c: /F
Answer Yes to question (Y).
(This will do only what is normally the Boot drive.)
More info:
http://www.ss64.com/nt/chkdsk.html

                             Rick Glazier

From: "Cheryl J Hansen"
>How do I do a disc check. My computer does it once in awhile when I turn it
>on, but was recently told that it should be done on a regular basis similar
>to defrag but have forgotten how to do it.

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