PunkBuster is a program created by Even Balance Inc. designed to detect forms of cheating in online games. It has been used in several prominent multiplayer games up until 2015, where development seemingly ceased as no new games were released with the anti-cheat protection, nor were any more updates or news published regarding PunkBuster on the official website. Although it was in development since 2000, it was known to still cause problems with other programs and certain hardware configurations years after its initial release.
Most games that require PunkBuster for multiplayer will install it when the game itself is installed. In cases where it is not, details on installing PunkBuster can be found at their website.
On occasion PunkBuster may release an update for a specific game. In this case, the game will usually kick you from servers if you are running an old version of PunkBuster for the game. To update the version of PunkBuster for a specific game, download PBSetup.exe from their website. If the game you want to update isn't listed in the main view, select Add Game and find the game you are looking for. Once it has been added to the main window, select the game then select check for updates. If there is an update available, PunkBuster will then install it.