|First, Clean out history, cookies, internet files, etc.|
Second, Turn off unused plug ins in your browser.
Third, Update and run Antivirus program.
Fourth, Install and run Malwarebytes.
Fifth, Turn off unneeded programs from automatically starting with Windows.
Sixth, Run disk clean up.
Seventh, Defrag disk.
Not all of these are obviously directly connected to your specific problem but they are normal maintenance and should be done periodically anyway, cannot hurt and should help.
You should have posted this problem under Vista, rather than under CPU/Overclocking. Post back results and include more details and system specs for more help, but in the future post correctly please.
You have to be a little bit crazy to keep you from going insane.