To speed up the load time of the Start menu, Open the Registry and look for this string:
In the right pane, right-click on the 'MenuShowDelay' key and select 'Modify'. Change the value to a number between 2 and 20. If you do not see this key, create it by right-clicking on an empty space in the right pane and selecting 'New->String Value'. Name it 'MenuShowDelay' and and give it a value between 2 and 20.