Do you have the latest (sometimes it's best to get the last stable driver, say 80 rather than 83, than the latest) graphics drivers?
Try -start -run -directxdiag -ok to see if it flags up any problems.
How about updating directX
Is it all apps that cause this, or 1,2,etc?
It's poss. that one of these apps is loading a driver (printer, or even a truetype font, don't laugh these are driver/progs on their own)that is conflicting with your graphics driver. If this is the case, then updating the gfx drivers should sort things out.
Hope this helps.