What is the exact reason behind slow boot up?
Dear all,
I have recently done the clean install of snow leopard to my macbook pro 13inch. Very happily, I started installing all the software upgrades, ilife, etc, but then I noticed-as everyone eventually notices- that booting time is dramatically slow to the extent that it causes a big nostalgia to leopard system...

[It was about 45-50 seconds] Anyway, I somehow remembered, among all this messy psychology, that I shut and restart the computer before installing the software updates of 10.6.02, etc, and then I suspected that perhaps one of the updates were the reason. As an amateur detective, I would like to track down the sinner... Anyhow, I did the clean install of snow leopard again. I checked the times of startups (from pressing the startup button till the desktop readiness) and shutdowns, and I did not install any upgrade, any ilife app, or any personal data, etc. Here is the result of three tests: Average scores for shutdown=3-5 seconds; average scores of startup= 28-32 seconds.Then I installed the combo pack of 10.6.02, Itunes and Remote Desktop Client updates, and after finishing the installations, I run three more tests. Here are the scores: Average scores of shutdown=4 seconds; average scores of startup= 45 seconds... This is my tentative conclusion about the whole issue: Apple decided to solve some problems of Snow Leopard like the famous guest account problem, etc, on the risk of making one of its very particular good features of speedy start up to catch windows boot-up times... I really did not like this, and all the evidence seems to be indicating this conclusion. So what is the next step, shall we wait for one more update combo to fix this slow boot up problem or entertain for a while the speed of 10.6.0 without installing any update?