In Windows 7, by default there is a delay in displaying the Start Menu when you click it. This is a delay induced by purpose to allow Mouse Response times. However, the default delay time might just prove a bit too long and make you feel Windows is slow. To speed up the Windows Start Menu, edit the value of the Registry Key and set a lower values which suits your need.
Here is how to do it
- Open the Start Menu.In the search box, type regedit and press Enter.
- Navigate 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) for how many milliseconds you want the Menu to wait before it opens.Click on OK to apply and close the registry editor.Restart the computer to apply changes.