I keep getting this error. To note, the things I've done to try and solve it:
* Downloaded the entire Client a second time
* Uninstalled, reinstalled
* Repaired using the Installer
* Downloaded the .zip and pasted it into the root folder to replace the files
* Cleared out the registry, deleted the files/folder in 'My Documents' from the UK installation
* Deleted the files in the Application Files/Turbine/ stuff.
* Uninstalled the .NET framework and reinstalled WITH the hotfix.
* Tried using a different administrator account.
Please. Please help.
PROBLEM SOLVED:
Look in your C:\Program Files\Turbine\Dungeons & Dragons Online - Stormreach folder.
If you see a folder named 'en-GB', remove it. (I would suggest that you cut it and put it one level above, inside the C:\Program Files\Turbine\ folder.
Woo!