I had a similar problem with explorer.exe using up almost all the CPU time,
causing all sorts of other "inconveniences." I found and used the Process
Explorer as you mention below. I discovered that, within explorer.exe, there
was a thread running the program wsil32.dll that was hogging all the CPU
time. The program showed me that wsil32.dll is "Winlogon Startup
Initialization Library" which I don't know anything about (yet). I killed the
thread process to see what happened and my system "calmed down" to "normal."
Now that I found the culprit, I need to find out if it is necessary, what
does it do, and is it working properly. At least I have been able to make
progress since I found Process Explorer.
"Daniel MartÃ*n [MVP]" wrote:
> Hi, Dima:
> I personally use Process Explorer's Thread tab
> (http://technet.microsoft.com/en-us/s.../bb896653.aspx) to identify
> which thread in Explorer.exe is consuming 90-100% of CPU. If you
> double-click Explorer.exe, go to the Thread tab and double-click the thread
> that is consuming the most CPU, you'll see its stack, and probably one of
> the functions in that stack will be located in a codec file (.ax file).
> In some cases, after disabling the codec the problem will reproduce again
> with another codec involved. In that case, the probably culprit is a damaged
> video file.
> Of course, it's possible that the problem is NOT caused by a codec or a
> damaged video file.
> Daniel MartÃ*n
> Microsoft MVP Windows Desktop Experience
> "Dima" <Dima@xxxxxx> wrote in message
> > Hello!
> > explorer.exe uses 90% of CPU for a minute when I open a folder with movies
> > or scroll the list of the files. The view mode is the list. The thumbnails
> > are not shown.
> > How to know what codec makes explorer.exe use 90% of CPU? I uninstalled
> > Divx
> > Pro 7, this did not help. How to uninstall VP6 VFW Codec? I cannot fild a
> > uninstaller for it. I do not see any other codecs. VLC Player is
> > installed.
> > Regards,
> > Dima