Looking at all your posts I would suggest seeing if some friend or relative of your's has an extra graphics card around. Running onboard graphics with only 64 MB of ram dedicated to it may not handle things very well. if you can even find an extra card with even 64 on the board itself might help.
Again this sounds crazy but a very thorough disk defrag might possibly help as well. If the only time you are getting this error is in wow I doubt it is your ram and could be something else, but I think playing WoW extends the system to a point where it fails. May also want to see the temps the computer is running at, could be overheating.