The importance of this cannot be overstated, some persons only think in the direction and fear the possibility of virus entering their PC and not Malwares. Some malwares are as dangerous, even more dangerous than some virus. A friend of mine had a malware in his PC that was actively taking screenshots of his PC screen and sending to a source, had he not noticed it on time, it would have done a great deal of damage to him because he does all business transactions and related from his PC. Get a good malware protection because these things are real.