A question which I came across recently…
I go to Start, Run and type in "cmd", I get an Open With prompt window that asks me to Choose the program you want to use to open this file: File: cmd 
I’ve used the "Browse" button to locate the Windows Command Processor, but I have to select it from the list of "Program." The "Always use the selected program to open this kind of file" check box is grayed out. I don’t even know why Windows has decided cmd is a file to be opened by an external application. This problem happens if there is a file named CMD in your profile folder, and Windows tries to execute it when you type CMD (without the .exe suffix, the file extension) in Start, Run dialog. (more…)
