Game disconnected: you were kicked by PunkBuster. Stated reason: PunkBuster kicked player '...............' (for 0 minutes) ... RESTRICTION: Invalid Memory Image 
That happened to me as but that was about 5 hours ago. And I can still play right now without the hacks. Have you been alt+tabbing in the game? Because when I started doing that my game crashed. I only have 4GB of RAM, no money to buy 8GB
When I played without any alt+tabbing it was fine, no crashes.