Once PunkBuster-enabled game detects anything suspicious it can give you a warning or worst, you can be permanently banned. Top-tier anti-cheating solution. With a decade and years of experience in the anti-cheat business, PunkBuster is undoubtedly leading the industry in maintaining fair play in various multiplayer games. The memory scanning How to enable Punkbuster? 1. Start > search programs and files > regedit 2. Open that then right click HKEY_LOCAL_MACHINE, then click find 3. Search for 'codkey' no caps no spaces without the apostrophes 4. What comes up is your key code, open up cod4 and go options > multiplayer options > enter key not that they are good. its that a server bans a player and submits to punkbuster. then punkbuster updates all servers that use them and that player is now banned from all servers that use punkbuster. but as stated you can find great servers that dont use punkbuster that have active admin that will ban hackers/cheaters as they join. Thanks. I just fixed this problem. Go to settings/options -> multiplayer -> punkbuster -> then click enable punkbuster. Easier than I thought. Saw a lot about manual updating and whatnot. you dont have to at least i dont personally because punkbuster carries alot of crap ware with it. Insert disc 1 in the DVD drive on your computer. The installation file should automatically load. If it does not load, click “Start” and “Computer," and double-click your DVD drive icon to start the program. Click the “Install” button. This takes you to a license-agreement screen. Agree to the terms of the license and click the YNFup.