* Click Start, and then click Run.
* Type Regedit in the box, and then click OK.
* Expand the menu in the left panel and select the HKEY_CURRENT_USER\Control Panel\Desktop folder.
* Scroll down in the right panel and double click on the MenuShowDelay file.
* In the Value Data box, change to default value for the menu speed from 400 to a lesser number, such as 1.
*Click OK.
Caution: Incorrectly editing the registry may severely damage your system. Before making changes to the registry, you may want to back up any valued data on your computer.