have to click XP dropdown menus to open

  clob 22:27 27 Jun 2007
Locked

When I open a dropdown menu (say in Firefox or Word) or a popup menu on the taskbar, I have to left click to open the submenu if there is a choice. This used to happen just by hovering over the menu option line. I'm not aware of having changed any settings, so any ideas how I can get this function back?

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