When dealing with viruses, yo don't really want to be taking short cuts downloading sh*t programs(one or two are decent if you look hard enough), even though Norton and Mcafee cost a fair do, they are worth getting, because they are the best, and because you pay for them you can get almost daily updates, with Norton and Mcafee working around the clock against dangerous and new viruses.. I install updates from Mcafee nearly every day. And if you are doing stuff such as online banking or internet shopping you need anti-virus software like this, its just not worth risking it. If you can afford norton or Mcafee, then get them, they will remove any viruses if they are fully updated, failing that, report to microsoft(the send error thing that pops up when your pc crashes). Hope I helped