AJR

There is a ReadyBoost cache on the HD whether or not you have an external
device and is used primarily for non-sequential read/write to the HD.

Turning off the service reduces CPU usage (mostly during "idle" time),
however depending upon what activity is going on performance will probably
suffer.

"E-" <E-@discussions.microsoft.com> wrote in message
news:0CED13CD-4036-4F54-929F-CE3F2CAFC388@microsoft.com...
> Hi,
>
> For the past couple of days, I've noticed my CPU usage is very high at
> idle
> (>50% on one core of my Athlon64x2).
>
> I finally got annoyed enough to try to work out what it was, and it turns
> out it was the readyboost service (I used task manager and the process
> explorer). This is odd, because I don't have any USB drives attached to
> the
> system. What's stranger is that it happened at every boot, and I was
> unable
> to stop the service while it was running.
>
> I've now disabled the service at startup, and we're back to normal CPU
> utilisation levels.
>
> Does anyone have an idea as to what could be causing this?
>
> Thanks,
>
> Edwin