Thank you very much for this tutorial Andre I have a HP Pavilion a1267c MS-7184 Mainboard with now unsupported ATISB400 chipset, no BIOS update past 3.47. The USBPORT.SYS was maxing one of my AthlonX2 4800+ cores after installing Windows 7 Pro. It didn't slow things down much but the CPU fan was at mid rpm all the time. I had to disable the USB's before things went bask to normal. I am triple booting XP, Vista and 7 with no issues with the other OS's and thinking I will use a add in USB card and continue to test 7. Posting this....I just realized that I will not be using any of the MOBO onboard devices now. My HD GPU, HD Audio, GB Net and now USB are all add in cards. Again Thanks