Sorry, if I made it worse.
I really dont see any else. all your startup programs, programs that were running in the background were all ok, nothing out the norm.
If reinstalling does not help then I would just do a complete reistall of windows. Its not as bad as it seems to do that if you save all important stuff to a seperate harddrive or Cd-rom. Download all driver need to get on the internet, videocard, sound, motherboard, ect.... put them in a safe place.
After a reinstall, go directly to Window update and download all important updates nothing extra.
After all the important update and you downloaded .NET 1.1 sp1 then reistall DDO with nothing else on your computer beside DDO it should work fine. then reinstall other programs.
its can be pain but, it helps sometimes, its like getting a oil change in your car or for some people it might be like getting a new engine.