Try to see any Error message in the Event viewer that may lead to the
culprit for this Error message.
To access Event Viewer do this:
Open a Run Command and type:
eventvwr click [OK] and look for Error Messages (X) there and double click
them to get more info about the program causing this, then post them here in
your next Post.
Read this article and see if it apply to you:
Unable to run CHKDSK http://support.microsoft.com/kb/555484
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