Hi,
I had this problem too in the past... But now is fine... was only
temporary ( Core2Duo E6600 )

"AJR" wrote:

> Check the following for info regarding CPU spikes
>
> http://blogs.technet.com/markrussino...e/2008/04.aspx
>
>
> "TiggerGTO" <TiggerGTO@discussions.microsoft.com> wrote in message
> news:4BB28B5A-F9A5-4111-B148-27FDEACCF3E5@microsoft.com...
> >I built a Q9450 quad-core based system with 8GB of RAM and have installed
> > Vista Ultimate 64-bit, SP1. Frequently, something seems to cycle through
> > the
> > processors making them spike. It can last from 10-15 seconds to several
> > minutes. During this time, the system is quite unusable. The mouse
> > responds
> > very erratically to movement, and typing is nearly impossible. I've tried
> > watching processor manager, but can't see any processes sort to the top
> > when
> > sorted by utilization. The performance graph looks like a seismograph
> > during
> > an earthquake on all 4 processors.
> >
> > There are a couple of correlations that I have found. First, if I start
> > from a cold start (i.e. with the computer powered off), I will get one of
> > these cycles about 5-7 minutes after starting Windows that will last 4-5
> > minutes. This is fairly consistent but does not always happen. Also,
> > connecting or disconnecting hardware, like an iPod or an external USB
> > drive
> > seems to be likely to trigger one of these episodes.
> >
> > Another thing that I've noticed is that the system seems very slow to
> > detect
> > the insertion of a disk into or the ejection of a disk from the DVD ROM
> > drive. This may or may not be related.
> >
> > It's almost like some hardware detection drivers or services are
> > periodically freaking out and making the machine unusable.
> >
> > Has anybody seen anything similar to this or have any suggestions for
> > things
> > to check or changes to try?
> >
> > Thanks,
> > Danny
>
>
>