I get kicked from every server after a minute or two. I suspect Punkbuster, which is perhaps the most cumbersome anti-cheating tool out there. I tried to update it using pbsetup, but it only recognizes Crysis, not Crysis:Wars. Punkbuster is enabled in my settings.

I have no issues with Team Fortress 2, which uses the Valve Anti-Cheat System, and does not require three or four random extra processes on my machine to be precisely in sync with a master server in Timbuktu.

I'll give this a couple more tries, then I am uninstalling it. No time for glitchy, badly coded multiplayer.