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
If you want to reset your development environment of your visual studio, then you can use Import and Export setting wizard. see this for all steps:
http://www.authorcode.com/forums/topic/how-to-reset-development-environment-settings-of-your-visual-studio/