An unnecessarily long delay period is built into XP for opening the start menu.
The reaction time can be shortened by making a registry entry.
How do I change the response time of the start menu?
Start >> run >> regedit
HKEY_CURRENT_USER \ Control Panel \ Desktop search
In the right window MenuShowDelay open with a double click.

The value MenuShowDelay on 0 (zero) put.

From now on the start menu opens immediately.
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This tip is from www.win-tipps-tweaks.de
© Copyright Michael Hille
Warning:
Using Registry Editor or its tips incorrectly can cause serious problems:
which affect the entire system and require a new installation of the operating system.
Tampering with the registry files and using the tips is at your own risk.