Posts: 15,346
Threads: 112
Joined: Apr 2007
I was having trouble with the server kicking me out repeatedly the other day, but not any lag issues. If you're having the issue during a Turn 0 single player game, it sounds like something on your PC isn't happy with the game. Here's a few shots in the dark:
Do you have the standard or steam version of the game? Either way, you may try locating the exe->right-click->properties->compatibility and try that? I've seen that solve weird issues before.
If you have steam version, you might right click the game -> local files -> verify integrity of the game cache.
Also, take a look at your installed programs list and see if anything installed right around the same time as your problems started. Same thing with windows update.