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. This will
allow the different tiers to appear instantly. Start Regedit(Go to run and type
"regedit" and press return ). Navigate to HKEY_CURRENT_USER\Control
Panel\DesktopSelect MenuShowDelay from the list on the right.
Right on it and select Modify.
Change the value to 0.
Reboot your computer