2.Type regedit. Go to HKEY_CURRENT_USER\Control Panel\Desktop
3.Select MenuShowDelay from the list on the right.Right on it and select Modify.
Change the value to 0 -400
4.Reboot your computer.
Faster Start Menu
Add or Edit Sring = MenuShowDelay, Value = 0 – 400
Changes the delay that for Windows to show a menu in the start menu