When you click the Start menu, there’s a brief delay before it appears.
You can change this to make the menu appear faster.

Here’s How:

Open Regedit, and go to:

HKEY_CURRENT_USER\Control Panel\desktop.

Look for a value called "MenuShowDelay". If the value is not there, you can add it by right clicking the right window, and selecting New, String value.

If MenuShowDelay is already present, then the default value would be around 400. This is the number of milliseconds taken by the Start Menu to pop up. Reduce this number to the extent you want. You can even put in a 0 for no delay. I did this myself with a zero and I have to be pretty accurate with my mouse on the menus but I like the results of this setup.

Restart your computer to have the changes take effect.

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