E-

One additional bit of information (in case it's useful) - Process explorer
finds the following thread using 50% CPU time (1 full core!) on one of the
service host processes:

emdmgmt.dll!EMDMgmtGetCacheStats+0x673c

"AJR" wrote:

> 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
>
>
>