Maybe it is asosiated in anuther program. I hav 2 programs, LiteStep and WinPowerPro:

In LiteStep I hav:
WIN+Z = Popup Menu
WIN+X = Command Line

In WinPowerPro I hav:
WIN+C = MS-DOS Prompt
WIN+S = Screen Saver
WIN+P = PowerPro Menu

And in DOpus, wat dus that do?