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I'm downloading something from mediafire which really has many sponsor sites that are not good: and And possibly the cause of some spyware and adware in my system. Does killing the whole process of firefox and not closing those pop-up windows(ad sites) helps avoid the effects of those bad sites.

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killing processes is a great way to avoid spyware. i've noticed that if i kill explorer.exe and all svchost processes, my computer shuts down and i don't get any spyware. :) (this comment is a joke. don't kill your explorer/svchost processes unless you know what you're doing.) – quack quixote Apr 21 '10 at 0:25
up vote 1 down vote accepted

Probably not.

Basically if it's already downloaded and running, forcing the process to quit will most likely not help in any way.

As a site note I have found no malicious scripts on Mediafire.

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yes, but its the pop-ups in that site worries me. Maybe the firefox add-ons that I'm using weakens the built-in pop-up blocker. That's why I see many pop-ups while I click on that download button. – Ieyasu Sawada Apr 21 '10 at 1:31

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