Re: 99-100% Explorer Processor Usage



Looking at a third incident on a separate PC of 'explorer.exe' hitting
99-100% CPU usage and persisting there, the four processes indicated in
my update of 'Thurs, Jul 13 2006 6:05 pm' on this forum have been
narrowed to two i.e. :-
(a) PccNTMon.exe
(b) OSA.EXE

The other two were without linkage to Windows Explorer when this
incident occurred. I suspect (a) above.

JS wrote:
One other thing, take a spare PC that has the FAT client installed and
exhibits the problem you described. Remove the client from this test bed PC
and see if the CPU is bogged down without the client installed.

I'm assuming that this client pulls a large chunk of data from somewhere and
then processes it on the local PC. It's possible that this client even
during non-user activity does some house keeping.

JS

"brayogee" <brayogee@xxxxxxxxx> wrote in message
news:1152803125.664402.212650@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Tx. Just some pertinent details:-
- The PC host a 'fat client'/2-Tier Windows application where the main
processing is carried out on the client front-end. These PCs are 'busy'
in that one can't unavail them for test purposes.
- The PC doesn't act as a web server.
- CPU usage hits 99-100% even where the PC has the custom application
installed but the PC has been left idle for a while.
- OS in highlighted cases were Win2K SP4

1. Of the four common and hence suspect processes when the issue occurs
ie. hkcmd.exe, ACIntUsr.EXE, PccNTMon.exe and OSA.EXE, what could
trigger the suspected 'PccNTMon.exe' process to misbehave even when the
PC is 'idle'?

2. Can one use 'Process Explorer' further to investigate this?

JS wrote:
If this PC is very busy as you indicated (and a possible web server?) and
there is a lot of file activity, this will cause Trend Micro's PccNTMon
real
time scanner to constantly scan and slow things down considerably.

JS

"brayogee" <brayogee@xxxxxxxxx> wrote in message
news:1152789922.413834.88340@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Nothing other than a gut feeling makes me feel 'PccNTMon.exe'
(anti-virus) is the cause even if the tool isn't indicating this.

How can one use to tell the exact process causing this using the tool?

Currently having to incremental eliminate this processes as issues on
very busy site machines(not the easiest sell)

brayogee wrote:
Comparing two incidents of the 99-100% persistent processor usage, the
following processes are common:

1. hkcmd.exe
2. ACIntUsr.EXE
3. PccNTMon.exe
4. OSA.EXE

brayogee wrote:
Yes.
The following processes are pegged to it:

hkcmd.exe
ACIntUsr.EXE
PccNTMon.exe
qttask.exe
internat.exe
OSA.EXE
Winword.exe
procexp.exe

The tool expressly indicates the 'parent'/root 'Windows Explorer' is
running at 100% CPU usage not any of the 'child' processes in the
hierachy.

JS wrote:
When running Process Explorer the first column is labeled
'Process',
in this
column you will find a process named Explorer.
Did you click on the + symbol to the left of Explorer to list what
running
under this?

JS

"brayogee" <brayogee@xxxxxxxxx> wrote in message
news:1152701428.434918.135000@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
The process that runs at 100% is 'explorer.exe' and is
represented
as
follows:

Process - explorer.exe
PID - 1564
CPU - 100.00
Description - Windows Explorer
Company Name - Microsoft Corporation

Right clicking the selected process and selecting 'google' takes
one to
the following link:
www.google.com/search?q=explorer.exe

This turns out to be general details about 'Windows Explorer'
but
nothing specific in regards to what is causing the 99-100%
processor
usage.

Is there more to how one can use this tool to identify what is
causing
Windows Explorer consume 99-100% CPU usage?

brayogee wrote:
Cool. Will update with info once received on the 99-100% CPU
usage
scenario for the benefit of all.

JS wrote:
Click on the process that running at 99%, once it
highlighted,
right
click
and from the options listed select: google
This should display what out there on the web about the
process.

JS

"brayogee" <brayogee@xxxxxxxxx> wrote in message
news:1152529978.981133.123170@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Thanks.

Looking at screenshots when the reported problem occurs,
the
application runs as a single separate process whose CPU
usage
and
memory consumption is normal. The abnormality lies on the
separate
explorer.exe process which consumes 99-100% CPU.

Query: Using this tool, in a Treeview format view and the
listing off
explorer.exe, how can one know exactly which application is
making
Windows Explorer misbehave?

JS wrote:
You need to find the specific process in that custom app
that's
taking
all
the CPU resources.
Try Process Explorer:
http://www.sysinternals.com/Utilities/ProcessExplorer.html

JS

"brayogee" <brayogee@xxxxxxxxx> wrote in message
news:1152375319.524422.117950@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi,
Have a problem where computers running a custom
application
are
experiencing machine freezes with Explorer.exe running
at
99-100%
CPU
usage for extended periods.This renders the custom
application
unusable.

The workaround is to kill the explorer.exe process or
reboot the
machine. This incidents seem to be of a random nature
and
occur on
multiple PCs. The OS's on this PCs are Win2K and WinXP
SP2.

Following is a list of findings so far as to the
possible
causes
of
this problem. None of them seems to have eliminated the
incidents
I'm
reporting:-

1. Hardware device or undetected hardware problems e.g.
USB
devices
2. Presence of a virus which takes on the form of
explorer
Ref:
http://www.computing.net/security/wwwboard/forum/14619.html

3. Bugs with anti-virus programme updates like
OfficeScan/TrendMicro
e.g. Ref:
http://esupport.trendmicro.com/support/viewxml.do?ContentID=en-124264

4. Presence of a corrupt AVI file on the server or
client
PC(s)
Ref:
http://www.beyond3d.com/forum/archive/index.php/t-8540.html

5. A bug with Microsoft products where Explorer.exe uses
100
Percent of
the CPU When You Right-Click an Item in Windows
Explorer.
Ref: http://support.microsoft.com/?kbid=837115

6. A bug with Microsoft products where Windows Stops
Responding
When
You Click a Large AVI File in Windows Explorer.
Ref:
http://support.microsoft.com/default.aspx?scid=kb;en-us;822430&Product=winxp

Is there anyone else who has experienced their Windows
Explorer
running
at 99-100% CPU usage? If so, what measure(s) were
successfully
undertaken to address this?

As I look deeper into this issue, I'd appreciate any
further
information based on your experiences with this issue.

Thank you.






.



Relevant Pages

  • Re: 99-100% Explorer Processor Usage
    ... The tool expressly indicates the 'parent'/root 'Windows Explorer' is ... CPU - 100.00 ... Windows Explorer consume 99-100% CPU usage? ... Ref: http://www.computing.net/security/wwwboard/forum/14619.html ...
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  • Re: 99-100% Explorer Processor Usage
    ... The tool expressly indicates the 'parent'/root 'Windows Explorer' is ... CPU - 100.00 ... Windows Explorer consume 99-100% CPU usage? ... Ref: http://www.computing.net/security/wwwboard/forum/14619.html ...
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