Try verifying the game cache... or If you feel up to it... delete everything and re-download the game... with the recent update... It might be easier...
I can vouch that they are... I run my Steam games on it... Microsoft has not done away with backwards compatibility in the Windows OS... HALLELUJAH! ...
A community is a place where YOU want to be... I stay in TNS because I have friends who play here and I wouldn't trade that for adminship for another...
T-virus is awesome... if anything the Traitor's Golden Gun or the Turtle Nade ruins T-rounds more and I don't want those gone either... Each one can...