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
I close them, but they always come back
When you say "they always come back" do you mean "next time you restart Visual Studio" or "immediately"?
One quirk of Visual Studio (at least VS2005) is that settings aren't saved until you exit. That means that if VS crashes at all while you are using it, any layout changes you made will be lost. The way around this is to always gracefully exit when you have set up everything like you want it to be.
Not sure if this will help your particular situation though.