If your on Windows 7 open the start menu and type Device Manager, open that and drop down Human Interface Devices, you should see eHome Infrared Transceiver (among other things) right click it and choose to uninstall, if done correctly when you're in-game and you press the "~" key the HUD should disappear, the game should freeze, and you'll be able to put in a command, when you're done press "~" to exit the console and continue playing.