Due to the way the anticheat executable is built, you may get a pop up from your anti-virus software saying the file is infected, or it may simply appear not to load when you try to use it. This is a false positive, meaning the detection from your anti-virus software is wrong. I tried at one point to email all the anti-virus vendors and have them fix this, but since there is no easy way to contact them all at once, it has become too much work to do for every single anti-virus product. So now you will need to add anticheat.dll to your anti-virus ignore list or exception list. This thread will show you how. NOTE! Simply closing your anti-virus usually just hides the alert windows, unless you actually configure exceptions or disable the drivers, it will still continue to run in the background and cause problems.
Select your product:AVG Anti-VirusESET NOD32
You may also consider using Microsoft Security Essentials
, a free and very good anti-virus product from Microsoft that does not have false positive issues.