close every app everything is running and run on idle, open task manager, chk the network tab if theres any usage of the internet, chk the processes for unusual activity and post here,
you got static or dynamic ip?
-disconnect your internet and reconnect
-download any free trial anti spyware and run a scan (superantispyware is my suggestion)
-change password for you accounts
-uninstall you browser and make a clean run with Ccleaner and for registries
-make a clean install for the game