Cool! You already have access to the command line. Now you have to … give the order! That is, “order” to close the faulty program (yes, unfortunately you need to know the exact name of the program you want to close). To do this, enter the following command in the console bar:
taskkill.exe /f /im XXX.exe
where XXX.exe is the name of the program you want to close (e.g. explorer.exe). Once you have entered the command, press ENTER.