Reinstalling the OS is for n00bs that don't know how easy it is to get rid of 99% of malware.
Here is a Microsoft employee stating that once a system is comprimised it can no longer be trusted.
http://technet.microsoft.com/en-us/libr 12587.aspx
You can’t clean a compromised system by using a virus scanner.
Also,
>using windows
>using closed source software
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