Windows Vista is delayed in the configuration menu so that it waits for a certain period of time when they fall over a menu item before the enlargement of other options. For most users this is fine, but power users can expect to find annoying and rather have instant menu opening speeds in the mouse pointer over. A simple registration will allow you to accelerate tweak the menu. First load the Registry Editor by launching the menu Run regedit (Press R + windows key to access the menu run):
Then navigate hkey_current_user \ Control Panel \ Desktop on the side panel, then right-click on MenuShowDelay and select Modify:
Once rebooted their menus from sliding nearly instantaneous speeds. The default is 400 if you want to restore the default menu.