I don't know if anyone else has been having the same problem, but I tried to download the High Res version of DDO and every time during the install process, there were corrupted files and I could not install the game. After trying this twice on my desktop, I tried to download the normal (standard) res version and got the same problem with corrupted files. I then tried to download the client on a different computer, copied the files over to the desktop, and then tried to install it again. Again, there were corrupted files and the install could not finish.
If this is the case, there may be a problem with the game clients themselves. To whom it may concern, please check them out, I would hate to see there be a drop in players because no one can download and install the game.
After searching the interwebs for awhile, I located and obtained an older (like Update 7) high res install package. Before running it, I made sure that I had uninstalled DDO. I also had to manually delete the "Turbine" folder from my Program Files. After that, I rebooted and ran the install. It automatically updated itself to the current version and has so far nt given me any problems.