Slow Startup?
1. Start up in Safe Mode .. this will run the "Repair Disk" utility.
Be sure the computer is turned off.
Now press the power button.
Just after you hear the startup tone (NOT BEFORE), press and hold down
the shift key.
Now release the shift key when you see the start up screen with the gray
background with the Apple logo and the progress indicator.
During the startup, you will see "Safe Boot" on the Mac OS X startup screen.
2. While in Safe Mode Repair Permissions ... Remember to do this Before & After any Update
Close all open files and applications. Go to Macintosh HD/Applications/Utilities/Disk Utility and double click it. Then select "Macintosh HD" in the left panel and First Aid at the top. Then click on "Repair Permissions."
To leave the Mac OS X Safe Mode just restart your Mac normally, without
holding any keys during the startup period.
Other things to try if this does not resolve issue ...
3. Download and Run this ...Onyx
http://www.macupdate.com/info.php/id/11582
Go to Automation Pane ..
Check all the boxes EXCEPT
1. Optimize the system
2. Hidden DS Store Files
3. Links between documents and applications
Also choose "Clear All" in the button box for caches. Then execute