Here is a detailed guide on how to solve this problem, if you have windows 10 and windows defender or another antivirus is tagging the game client as a virus, a false positive, here is how to solve it: This solution is the same for all antiviruses, if you don't know how to add an exception on your antivirus simply Google "my_antivirus_name how to add file exception".   Step 0 - Notification (Optional) Allow the file as pictured once you see a virus report notification and cli