If after several minutes, you still see WinAppxD in the task list, you can try a more "drastic" measure and try to "End Process" the WinAppxD.exe entry in the task list. It's several minutes after that, and it's still there? The most drastic way of stopping WinAppxD, if you have the NT Resource Kit installed, is to use the kill.exe command provided by the Resource Kit. (Hint: You probably have this installed, since some utilities from it are required to install and run WinAppxD. Do a Find for "kill.exe" if you can't locate it.) (You must be logged in as Administrator to do this.)