What did you try? Here is how to update/reinstall your Display
Adapter...

......Start..........
The first thing to do is to remove the video adapter you have
installed. Right-click on the desktop; choose "Properties" from the
drop-down menu; select "Settings;" click on the "Advanced" button; and
click on "Adapter". An adapter is a program that tells Windows how to
deal with a specific video card. Make note of the adapter that is
currently installed. Then, change the adapter to "Standard Display
Adapter (VGA)" and restart the system.

[That is:  Click "Change, Next, bolt 'Display a List...', Next, bolt
'Show all hardware', scroll left pane to top, select '(Standard display
types)', select 'Standard Display Adapter (VGA)' in right pane, click
'Next'"... PCR]

This will remove the current adapter and replace it with a generic VGA
adapter that works with all video cards. You will not like VGA because
it supports only 16 colors, but the purpose of installing it is to get
rid of whatever was there before.

Next, return to the adapter screen and install an adapter that matches
your video card. This may or may not  be the adapter that you are
using now. Examine the materials you received with your computer to
see if they include a CD-ROM or floppy disk that contains the correct
video adapter. Or go to the Gateway website and see if they have an
adapter for you to download. Or check the website of the company that
made your video card.

Bill Starbuck (MVP)
......End....of quote of Starbuck...