My computer is stuck on 640-480-16colors and won't adjust to any other setting ?

Answer:

Problem beside video card drivers or time for a new video card.
You inevitability to update the monitor adapter driver. Get the driver here.
You need to install the proper drivers for your video card, or your video card may only just not support it (I HIGHLY doubt that).
Go to devise manager and update the driver.

Adnan Sallam

Napa, California