Solved How do I switch from integrated graphics?

[daiodine]

The situation is I'm trying to play Fallout 3, but it keeps creating random visual glitches, like purple checkerboards and grey light tunnels around the characters' faces. I assume this is because It refuses to switch from the integrated Intel HD 4000 graphics to my AMD Radeon HD 7730M. I only really want to get rid of the purple checkerboards.

(refer to image)
The drop down menu for the graphics adapter only has the Intel HD.

 

[GeneO]

Likely a BIOS setting. Fill in your hardware (motherboard manufacturer and model).

 

[daiodine]

Actually never mind. I seem to have fixed it.