After installing a new video card, the display shows only 16 colors and 640x480 resolution. What should you do to fix this?

When a new video card is installed and the display is only showing 16 colors at a resolution of 640x480, it indicates that the system is not utilizing the full capabilities of the video card. This is often due to the lack of proper drivers, which are essential for the operating system to communicate effectively with the hardware.

Downloading and installing the latest driver from the video card manufacturer’s website is the best course of action because drivers enable the operating system to take advantage of all the features and performance enhancements that the video card provides. The default display settings that Windows applies when there are no specific drivers installed often revert to basic functionality, leading to limited color depth and resolution.

The latest drivers typically include optimizations and fixes that improve performance, stability, and compatibility with various applications. Hence, by installing the correct and most up-to-date driver for the video card, the system should be able to display the full range of colors and resolutions that the hardware is capable of supporting.