As a techie and owner of a geek-squad style company, I find that the worst thing for a computer is an incompitent user. A person that clicks on ads, downloads from advertisements, has no anti-spyware or firewall, incompitent overclockers, etc. Most people just screw up thier own computers. Notice how the educated(in computers) people never have problems. 90% of my clients create thier own problems and its almost always preventable by getting some computer common sense.
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