Proof that Antivirus software makes your PC crawl
...Everyone has always suspected antivirus software of slowing computers down (at least through anecdotal evidence), but no one has ever been able to really quantify it precisely. A young English gentleman in the UK who goes by "Oli" has posted this wonderful analysis on "What really slows Windows down" and posted some detailed measurements on the effects of typical desktop software and security suites.
The desktop Antivirus suites all appear to make your PC run slower than a 5 year old computer when it comes to slowing hard drive I/O down which is the biggest factor in PC wait times. » Proof that Antivirus software makes your PC crawl | George Ou | ZDNet.com
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