Hello PC Experts i just finished my building my PC and i want to know are there any good antivirus protection program i should download ? Im mainly going to be using my PC for gaming and web browsing and i want to be safe. Im coming from the console platform and i don't know a lot about which antivirus program is good. On my old PC my sister clicked on a pop up about a month ago, and every time i went on the internet i would constantly get a message pop up saying that my computer is infected and to call my internet provider, but instead i downloaded Norton Internet security 20 day trial and it removed all the viruses but it also removed a few game mods from my old star wars battlefront 2 game. And i want to know are all the free anti virus software the same ? Like if i were to download something and before i open it, will the antivirus scan it before i open the file like Norton internet security does ? My asrock H97m Pro4 motherboard came the drivers CD with a Norton Internet security program but my friend said to not download it because it will make your computer run slower because its running in the back ground and to download another free antivirus program off the Windows website. Also is AVG or Avast antivirus any good ?