no, it's fine to ask here.
i was going to suggest you reboot - it sounded like one of those errors that happens when windows runs out of graphics "resources" which can happen if you have too many greedy programs running at same time, but you already tried that. if you have 256mb or less that could also be the cause.
another thing to definitely try, is somewhere there is a way to reset photoshop to its "default" settings, like holding control when you start it or something (i cant remember, search on web). sometimes they suggest this when things go wrong.