I have a dell xps 410 that doesn't turn off. When Turn Off option is selected it just reset and start the boot again. It statrted with this problem after a disfragmentation and disk clean up. Any suggestion to fix the problem?
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start-->run-->eventvwr.msc-->look under system for errors (red X's).
Did you use the windows defrag and clean up utilities, or a 3rd party software?