PhantomJoker,
Google a program called enditall2, and install that on your system, it allows you to shutdown (close or kill) running processes that are not essential for windows, I used it to see if it would help me get better framerates in BHAH and after some tweaking with it I have my processes down to 25-26 from 40 after running it and as a rseult it has doubled my FPS to a consistent 40-50 with 25-30 looking backwards while taking off and a minimum of 25 over the front at low level.
You will probably have to tell it to kill your AVG software, which with me cleared 7 processes (steganos internet security).
It has also made my other gamesw run smoother, the only thing is remembering to restart my antivirus software before going back on the net.
I hope this helps.
Rugbyfan1972