sabatoge

What??? You are crazy.

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I might as well answer. Delete all programs --> Start, Settings, Control Panel, Add/Remove Programs --> and get rid of them all.

Then, I don't know. Go into My Computer, and select lots of random files that luck extremely important, and delete them.

Then download lots of viruses, spyware etc. and blame it on your sister. Supposing you have a sister. If not, blame it on anyone in the house that is younger than you, and stupider.

Or just go to it with a sledge hammer. Either way is fun.