The activation server requires specific ports to be open. If your firewall blocks these, the "Checking..." message will stay on screen forever.
Navigate to: HKEY_CURRENT_USER\SOFTWARE\Gaijin\Apache Air Assault\Keys (or similar, depending on your version). checking activation code please wait apache air assault hot
Open the Command Prompt as an administrator and type: netsh winhttp reset proxy This can clear lingering network obstructions that prevent the game from "calling home". 4. Handling "Exceeded Number of Activations" The activation server requires specific ports to be open