Re: trying something new, instead of antiviruses...
Try Deep Freeze. its not free but what you do is basically freeze an image and any changes to the system during normal use as discarded after you shut down. You can "thaw" it when ever you please so you can install updates or new programs and then freeze it again when you are done. So even if you get a virus as long as your image was frozen it will be discarded with the rest of the stuff when you shut down your computer.
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