Open your registry and find the key below.
Create a new string value, or modify the existing value, named 'MenuShowDelay' and set it to equal the delay you would like before the menus are shown as a time in milliseconds.
Logoff, or restart Windows for the changes to take effect.
Key:[HKEY_CURRENT_USER\Control Panel\Desktop]
Value Name: MenuShowDelay
Data Type: REG_SZ
Data:0-999 (milliseconds)
