You may notice on your computer that there is a lag time when you go to launch your Start Menu. If you are concerned about Windows XP performance, this may be slightly bothersome to you. So here are two tips you can use to speed up the performance of your Start Menu.
First, you can open the Display applet within the Control Panel. From the Display Properties dialog box, click the Appearance tab and then click the Effects button. Remove the check beside the option to Show shadows under menus. When this option is enabled, Windows XP will display a slight shadow under Start Menu options giving it a three-dimensional look. So disabling this option can improve performance.
Another option you have is to make a small change to your registry (of course, as always, you are encouraged to perform a backup first). Once you open your registry (type regedit at the Run command), navigate to the following registry key:
Right-click the MenuShowDelay option and click Modify. The default value is 400. You can reduce it to as low as 0. This registry option controls how quickly your Start Menu shoots out.
So by performing these two Windows XP tweaks, you should see an improvement in how quickly your Start Menu is displayed.