Windows XP is touted as a new generation of OS Xperience. No doubt about that but this experience come at a cost. Resources. If your hardware configuration (read CPU,RAM) is not upto speed but still want to boost response time of start menu, here are a few tricks that might help. Open registry editor by going to START-RUN and entering regedit and navigate to key
HKEY_CURRENT_USER \ Control Panel \ Desktop \ MenuShowDelay
I hope this will help you.