Alright. During one offline game, (just looking at some new maps I dl'd) TF2 proceeded to bug out and began to freeze up every few seconds. At that point I quit the game, and then restarted my computer. Upon later restarting TF2, it never got past the opening screen (artwork of 3 or 4 members of red team, loading box still in the lower right corner, mouse still functioning) but it never froze or gave an error message. I tried again, but with the '-window' startup mode, same thing. I fully uninstalled TF2 and reinstalled it. Still, same thing. Any ideas?