Speed up the Menu Show Delay Time Information: This will show you how to change the amount of time it takes for a menu in Windows 7 to pop, fade, or slide open when you run the mouse pointer over it.
Instructions:
Press [Win] + R or take the RUN option from the start menu.
Now type regedit there and press Enter Key to open up the Registry Editor Window.
In regedit go to HKEY_CURRENT_USER\Control Panel\Desktop
In the right pane, right click on MenuShowDelay and click on Modify
Type in a number between 0 to 4000 [400 is default, I use 1] for how many milliseconds you want the Menu to wait before it opens.
Log off and log on, or restart the computer to apply the changes.
Note: The lower the number, the faster the response time. If you use an entry of 0, there is no menu display delay. However it is not recommended to use 0 though since the menus may be hard to navigate through at that speed.