Having real trouble

Hi I have already raised a ticket but havent seen a response so i would like to explain again anti cheat supposedly picked something up as I restarted my pc and now i can not play online at all no multiplayer or coop i have not ever used any anti cheat software and would like to continue to play online since it is a game i very much enjoy i have done everything i have found online to fix it and it has not worked so if someone could help me out that would be much appreciated