Speed Up Menu Display


When using the start menu the you will notice a delay between different tiers of the menu hierarchy. For the fastest computer experience possible I recommend changing this value to zero or one. This will allow the different tiers to appear instantly.
Start Regedit. Find string named HKEY_CURRENT_USER\Control Panel\Desktop. Select MenuShowDelay from the list on the right. Right on it and select Modify. Change the value to 0 or 1. Reboot your computer.
Now feel the different after you change it with before one. Your menu display will go faster.

Source : 1001 Tutorial