Very Good System booting SLOW

Hi, I have a Windows Vista x64. I never really minded the boot time since I would walk away when it boots. But when i realized that it was taking 3 minutes to boot, i knew that something was wrong. I'm an advanced home user and tried a lot of tweaks(msconfig, services, BIOS, some registry) and nothing really worked. When I power on the system, the BIOS screen is about 3 seconds, then the Windows Splash(I have 'no GUI boot"), then a 2-3minute of unactivity. It's just a black screen, the keyboard and mouse don't work. Then the Vista logo appears and instantly my desktop. Once the desktop appears it's usuable. I read somewhere that 3rd party boot screens affected boot time, so i uninstalled LogonSudioVista, but same result. I defrag HD and registry, and also cleaned registry too. I have very few start up programs and disabled them but still a 3 minute boot time. I have a great system but a extremly disappointing boot time. I even tried HP chat, they redirected me to websites that I already visited. There are no external hard drives connected. I uninstalled all the bloatware that comes with HP.

System Specs:
Model: HP pavilion m9340f
CPU: Intel Core 2 Quad Q6700(2.66GHz) no overclocking
RAM: 6Gigs
HardDrive: 750gigs at 750rpm
GPU:Nvidia Geforce 9500gs

Thank you in advance for your help:D

Have a look at these Tutorials,
http://www.vistax64.com/tutorials/81176-speed-up-performance-vista.html?filter[11]=Performance Maintenance
http://www.vistax64.com/tutorials/165576-how-make-vista-more-responsive-faster.html?filter[11]=Performance Maintenance
HTH.

Looks like you've covered all the basis. My system is comparable to yours (vista 64 as well) and from depression of the power switch to usable is 1:15 (I just timed it) and that includes entry of a password.

I have been thinking about using sleep again (as soon as I built my vista box I set my start menu to classic and I exclusively use Shut Down.) I just timed an awakening of my box from sleep and it took 12 seconds from completely inactive to usable (again with entry of a password). Try sleep out then consider reinstalling vista and only reinstall the bare min of what you need. Could still be programs slowing you down.