best antivirus for PC

Have an urge to hit people ah, I really hate is a computer hacker, now the reason I get angry I was in the first half of this year has bought two computer, not my money to buy is not I want, but the computer virus, can not be used, each time to get the computer the maintenance department have said, can not be used, advised me to buy a Taiwan heart, I really Speechless. How to have a best antivirus for PC? If there is a best antivirus for PC, I have to install the best antivirus for PC, I have to protect my computer that you must install best antivirus for PC, I hope I can find the best antivirus for PC as soon as possible to protect the next my new computer.