SuperF4 kills the foreground program when you press Ctrl+Alt+F4. This is different from when you press Alt+F4, which only asks the foreground program to exit, allowing it to decide for itself what to do.
You can also kill a process by pressing Win+F4 and then clicking the window with your mouse. You can exit this mode without killing a program by pressing escape or the right mouse button.
Added 64-bit executable. The installer will automatically install the correct executable
SuperF4 should be able to kill all kinds of processes, whether they are hung or not. Beware though, killing a program does not give it a chance to save unsaved work. If you accidentally kill explorer.exe, you can start it again by opening Task Manager (Ctrl+Shift+Esc).
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What does SuperF4 do? - SuperF4 kills the foreground program when you press Ctrl+Alt+F4. This is different from when you press Alt+F4. When you press Alt+F4, the program can refuse to quit. Windows essentially only asks the program to quit, and lets it decide for itself what to do.
You can also kill a program by pressing Win+F4 and then clicking the window with your mouse cursor. When you press Win+F4, the cursor will change to a skull and crossbones cursor, and the next window you click will be killed. You can press escape or the right mouse button to exit this mode without killing a program. -
Why would I need SuperF4? - You might have encountered a game that hung because of some stupid bug, then your computer gets all slow and you just can't get out of the game since it's fullscreen. Nothing happens when you press Ctrl+Alt+Delete to bring up the task manager. You eventually give up and reboot the computer by pressing the power button.
SuperF4 - 64bit software