Hotkeys are usually defined in the file hotkey.rc, located in your personal folder. That particular feature may be set by this line, however, located in your personal.rc file:

HotkeyNoWinKeyPopup

Comment it out to make the winkey work the "old" way. All this stuff is well documented, you really ought to do a little reading before you go any further.

http://wiki.litestep.com/Index