I had a plugin installed in Visual Studio 2008, and it created some extra dockable windows. I have uninstalled it, and I can\'t get rid of the windows it created - I close
How about running the following from command line,
Devenv.exe /ResetSettings
You could also save those settings in to a file, like so,
Devenv.exe /ResetSettings "C:\My Files\MySettings.vssettings"
The /ResetSettings switch, Restores Visual Studio default settings. Optionally resets the settings to the specified .vssettings file.
MSDN link