Yes Ang, a cooked (or cooking) videocard can do this - Windows goes into a self protection loop on boot, happens so fast you may not see the messgaes. Bad colour/image issues on the WXP screen before it does. Happened to myself and Cartesius. That is why I suggested swapping out with your other card and see if it stops.

Pass no temptation lightly by, for one never knows when it may pass again!