To tu píše každej. Tak update punkbusteru a povolit vyjímku ve firewallu

anebo:

A quick remedy for this connection problem is to set the timeout to be longer in your CoD 4 multiplayer config file, found in the profile folder of your player. For example, mine is: C:\Program Files\Activision\Call of Duty 4 - Modern Warfare\players\profiles\string\config_mp.cfg Yours could be C:\Program Files\Activision\Call of Duty 4 – Modern Warfare\players\profiles\YOURNAME\config_mp.cfg

Open the file up in notepad or any other text editor (I use ConText), and add this line: seta cl_connectionAttempts "30" – this will give the connection 30 seconds, and normally fixes the problem.