HP HC6400 - problem with drivers software in Vista Ultimate

hi

I had a clean install of Vista Ultimate on my HP Compaq NC6400. I have
installed all the latest drivers from HP website (there is not drivers for
Vista Ultimate in HP website so i choose driver for Vista Business x32)

However, i have frequently exprienced the BSOD (Blue Screen of Death). It
only happen when the computer start. It can not start and i see the BSOD
with "DRIVER ....NOT_LESS_OR_EQUAL" bla bla.

With several tries, when it start sucessfully i start the Startup Repair
Tool and was informed that i have to dowload the latest following drivers:

- HP MOBILE DATA PROTECTION SYSTEM
- HP QUICK LAUNCH BUTTON
- TEXAS INSTRUMENT FLASH MEDIA DEVICE
- TEXAS INSTRUMENT PCI GEMCORE BASED SMARTCARD CONTROLLER
- AUTHEN TEC INC AES2501

but what is the real problem? because i had already installed them correctly
and at the time of install, no error.

Can anyone help me?
Thanks
Tuan