"Curious'r and curios'r" said Alice ...

I'd like to know HOW you deactivated it. The PCI.SYS driver is the bus
driver for the PCI bus, and without out it, you basically don't have a PCI
bus. Methinks you THINK you deactivated it, but Windows, in it's infinte
wisdom, and because PCI.SYS falls in the catagory of a protected file under
System File Protection, most likely restored any registry changes you made
and restored the proper version of the file to the drivers directory. Now
.... when it did that, it is very possible in enumerating the PCI bus again
it reordered things such that a recalcitrant child connected to the PCI bus
in a more optimum place in relation to the other PCI devices. But that
driver still has issues since now your system is reportedly unstable.

That file is updated via Windows Update when there is an update for it.

--
The personal opinion of
Gary G. Little


"PhilTheGap" <oriane@noemail.noemail> wrote in message
news:35A3778A-0959-4BEE-B88A-866CB342B227@microsoft.com...
> Hi there,
>
> Running my brand new Vista, my CPU spikes at 100%, which prevents me to do
> anything. When I deactivate the pci.sys driver, the CPU comes back to a
> normal activity, but my system is very unsteady.
>
> I would like to know what is exactly this pci.sys driver. What is its goal
> ? How can I find another version in the internet to try to fix my problem
> ?
>
> Philippe