As long as you keep the anti-virus thing running at all times, you shouldn't have a problem.
You could also find a site that checks the safety of sites (I used the free Norton trial that came with my computer) so you don't go into a virus field.
Also, quick exit out of pop-ups like:
Our free software has detected viruses, spyware, and all of that other good stuff, on your computer. Our free software will run a free virus scan for you.
Exit out of those immetiately, and if you can't, kill them with Task Manager.
That's about it.
I'm done here. Living over at
thepurplecube.org as n.d. if you wanna say hi.