I dont know man it never lags not even in most games i have
Try to overclock your Athlon II (on the FSB) if your motherboard supports it, or switch it out for a Phenom II 955 or 1090t
Upgrade to Windows 10, and then download 64-bit Windows 10 Pro and reinstall with that
More ram is always fun, but make sure you get 64-bit windows first
put a video card in there, even a Radeon 250x should work.
>Upgrade to Windows 10
How much do they pay you?