comodo free internet secuirity suite,
includes:
-trainable firewall,
-full execution protection
-sandboxing enviroment
-real time virus scanner
it will prompt you every time you start something new, after a while everything you use will be trusted so you barely notice its there.
an adblocker like the one Kaminari suggested above will help while browsing and i would reccomend installing that as well.
comodo can be a bit slow when doing an actual full scan, the results are worth it though, it can even handle some of the nastier rootkits out there.
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//through chaos comes complexity//
the scent of the tamarillo is pungent and powerfull,
woe be to the nose who nears it.