the best antvirus you can get is maleware bytes .... you can get a free version but i recommend getting the paid version , unless you know how to use torrents and get the full version for free :) but for me and i am a computer tech and do repairs on pc's and always have customers coming in with viruses even though they had a anti virus most of them dont pick up the half of the new viruses these days , try this run a system scan using any anti virus and see what the results are , and before you remove the results , run a scan in malware bytes and it will detect more i bet