If you have number of programs installed on your system and it is taking time to show. Then here is a way to speed up,
Start -> Run -> Regedit
HKEY_CURRENT_USER -> Double click Contol Panel -> Single click on Desktop
then look for MenuShowDelay in right pane double click it and change the value data to '0' [zero].
by default it is 400.
Make sure that it is a registry trick. Do it properly otherwise leave it.
Don't forget to restart the machine.