1. Start game using -newui launch
2. Join any server.
3. Play the game.
4. After a random amount of time, but usually no more then 30 minutes, the game will freeze. Ambient noises from the game are heard, but everything is frozen (except the mouse cursor).
5. Clear freeze by pressing ctrl+alt+del.
6. Return to Windows desktop to find Steam open but the game no longer running.