Although, it was released on April 1, 2008, which might make some people
suspicious, Service Pack 3 for XP is an official MS product.
From MS's website:
Overview
Windows® XP Service Pack 3 (SP3) includes all previously released
updates for the operating system. This update also includes a small
number of new functionalities, which do not significantly change
customers’ experience with the operating system. This white paper
summarizes what is new in Windows XP SP3.
http://www.microsoft.com/downloads/...ad-bc34-40be-8d85-6bb4f56f5110&displaylang=en
However, he did mention that the problem occurred pre-updating to SP3.
My guess is something you are running, either a game, program of utility
are running in 8 bit graphics mode, or you have a built-in software
utility from your graphics card which may be switching the card on you,
either at the request of something, or due to some conflict. You may
need to remove and reinstall the the video drivers.
It is also possible a hardware problem has developed. Make sure the
cabling from the computer to the monitor is well inserted and stabilized
with the screw-downs, and a good quality cable, and that your video card
is well installed in the computer. This could still be an electronic
failure in the monitor or your video card. Also make sure your AC power
cable to the power bar or the wall is well inserted.
Art