Knowing the model number would help to find your system and get the information for it. However, I did some searching and found a couple posts that might help.
Check through them and see. This may not be your system, but the fix should be something similar. Should be able to tell the system which graphics card to use for a specific application.
"Everyone's got one. Better to be a smart one than a dumb one." - me
"It's people like you that [I]think[/I] you know everything that give those of us that [I]do[/I] a bad name." - me
"Eat, drink, and be Merry, 'cause Pippin was a fool of a Took."