Never heard of that video card, but I am going to venture to say it does not meet the minimum specs.
Realtek makes integrated audio/video chips. If your graphics is actually just an IC and not a card, that could cause problems. I've had nothing but problems dealing with IC stuff in the past.
There are also separate mouse issues that aren't video related. Vertical mouse-look is all out of whack, especially if you aren't getting very high frame rates. I've noticed even on my system a sort of lag or something with my mouse pointer. Moves almost likes it's on valium or something. Haven't figured out what's causing that yet.
EDIT: Just saw your 2nd response. That's still an IC though.