@marine72781,
Let me get this straight you get a off the internet message and you need to reboot during this part of the game?
Do you need to reboot in order to get the internet back or unplug/plug the router and or moderm?
I am thinking of some corrupt DNS servers database if it was just the game and not other windows open to the internet to other sites.
Try going to the run command and type cmd then hit enter and then at the command line type netstat –s 5 >>c:\scan.txt and allow it to run when you are playing your game.
When and if you have a lock up go to the cmd window and hit ctrl c and then try to see if the file scan.txt will help out the cable people and you could post it here also.