Ok, this is interesting. I installed DDO on my VAIO flip through Steam and it works fine. Unfortunately, this is not an ideal gaming computer, especially with its horrid touch pad. But I believe that means we can rule out any problems with the modem/router. Per my previous post, we can also rule out Windows Defender and MSE (which are both running on my laptop as well).
So what does that leave? I guess the driver (up to date), the BIOS (up to date), or some weird hardware issue. I can run other MMO's just fine except for LotRO (which was working three months ago before I uninstalled it). I guess there could also be some weird registry issue causing problems, but I wouldn't know what to look for in there and I don't poke around in there unless I have some specific targets.
I'm totally stumped!!