How old is this PC?
I suggest corrupting software not hardware as:
1. You aren't damaging physical property which is not only morally questionable, but also against the law.
2. You stand less risk of hurting yourself and also getting caught.
3. You may get a software upgrade this way without trashing the PC.
Got to my computer, C:\windows\
Click on the system 32 folder and hit Shift + Delete.
Kiss goodbye to OS and reboot...
Oh dear, looks like my windows has corrupted, I need a new install (and also Office 2010 as you guys didn't hang onto that Office 2002 install disk...)