I have a computer which kept crashing when loading up. We seem to have fixed this by adding an agp graphics card, bypassing the onboard graphics. This works and the computer has not crashed since. However, now the computer will only let me run it at 4 bit colour!!! I have tried updating the drivers of the graphics card, which is a matox 400 but it doesn't seem to work. The windows XP startup screen is shown properly but the 4bit colour happens as soon as the list of users appears. The graphics card has worked properly with winsows xp in another machine before so I don't think it should be a compatability issue between the two.
Does anyone have any ideas what could be causing this???