Hi everybody. I just found out and used this tweak, and it reduced significantly the boot time of my hp2500. (vista home premium x64, SP2) Maybe the advanced users are aware of it, but for those noobs like me...here it is: start/run type msconfig, press run The system configuration window opens. go to Boot tab and click advanced options check number of processors select 2 and hit ok, apply and exit the system config. Reboot and see how it goes. PS From the system config you can also disable some services and startup items but be aware that you have to now what you are doing.