Windows 7 - Multiple Display Option on Windows 7

I have just bought a compaq 2g3-350uk and it runs on windows 7. The main reason I bought this was so it can run with our sanyo projector. I have a problem because it does not give me multiple display option for me to choose the projector for display. In the system resolution option tab it only has 3 option and instead of four. The last option is not available.

lebo, welcome to the Seven Forums.

Not sure how you are connecting two displays to that computer (VGA splitter?) as looking at the specs for the motherboard in it,

Motherboard Specifications, H-Aira-RS780L-uATX (Aira-GL8) Compaq SG3-350UK Desktop PC - HP Customer Care (United States - English)

Compaq SG3-350UK Product Specifications Compaq SG3-350UK Desktop PC - HP Customer Care (United States - English)

it only has one VGA port, and no slot at all for a video card. If you are using a VGA splitter for both displays to be able to connect to the computer, that would be why Windows isn't seeing the second and showing the options for it because as far as Windows is concerned there is only one display attached.