[x]
Posted via EE Mobile

Search, ask, and monitor your questions on the go with EE Mobile. Visit Experts Exchange from your mobile device and never be out of touch again.
Question
[x]
Attachment Details
[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!
6.0

High CPU utilization with explorer.exe, multiple units affected.

Asked by johnb6767 in Operating Systems Miscellaneous

Tags: cpu, high

Hey all.

First of all....

NO spyware
NO viruses
NO malwares of any kind
HDD's are fine, no missing files
Images freshly RIS'ed
Only affects one model of laptop.

Ok...So basically explorer has a tendencay to get tanked around 50-75% CPU usage, and like I said it only affects a single model of laptop, HP NC9600. Usually this can be reproduced by right clicking a file, and seeing the context menu (have also used ShellExViewer to troubleshoot), sometimes just by browsing My Computer. Or, using the XP Menu Style, it gets stuck when navigating and waiting for a submenu to appear, like All Programs.  Also, resuming from a standby, or a scrensaver can cause it...

I haev already removed some of the common causes of this symptom:
"Show common tasks in folders"
"Fade or slide menus into view"
"Transition effects for menus and ToolTips"    No dice though...

Ok, so using Process Explorer, I haev narrowed down a thread that seems to occupy about 75-95% of Explorers usage..
Shlwapi.dll is always there with High CPU Usage when the system gets unresponsive. Here is a call stack of a few threads....

SHWLAPI.DLL
ntkrnlpa.exe!KiUnexpectedInterrupt+0x121
ntkrnlpa.exe!ZwYieldExecution+0x1c5e
hal.dll!HalpApcInterrupt+0xc6
hal.dll!HalRequestSoftwareInterrupt+0x3c
ntkrnlpa.exe!LsaDeregisterLogonProcess+0x16ba0
ntkrnlpa.exe!NtMakePermanentObject+0xd8f
ntkrnlpa.exe!ObOpenObjectByName+0xea
ntkrnlpa.exe!LsaDeregisterLogonProcess+0xc7e5
ntkrnlpa.exe!KeReleaseInStackQueuedSpinLockFromDpcLevel+0xb74
ntdll.dll!KiFastSystemCallRet+0x4
ntdll.dll!KiFastSystemCallRet
ntdll.dll!ZwOpenKey+0xc
ADVAPI32.dll!LocalBaseRegOpenKey+0xe4

EXPLORER.EXE
ntkrnlpa.exe!KiUnexpectedInterrupt+0x121
ntkrnlpa.exe!ZwYieldExecution+0x1c5e
ntkrnlpa.exe!ZwYieldExecution+0x24dd
win32k.sys+0x2f70
win32k.sys+0x3776
win32k.sys+0x3793
ntdll.dll!KiFastSystemCallRet+0x4
ntdll.dll!KiFastSystemCallRet
USER32.dll!WaitMessage+0xc
SHELL32.dll!Ordinal201+0x28
Explorer.EXE+0x1320e
Explorer.EXE+0x1a577
kernel32.dll!BaseProcessStart+0x23

I have only recently started to learn debugging, in my own environment, and through some of the dumps posted here, but I cant target this to a specific driver, or service. I am confident that it is either a driver problem. I have found minimal referecnes to ntkrnlpa.exe!KiUnexpectedInterrupt+0x121, and have found a few things that support that claim, just need to see if any debuggers out there can shed some light...Thanks!!
 
Related Solutions
Keywords: High CPU utilization with explorer.exe…
Title
1 Unable to clean system with suspecte…
 
Loading Advertisement...
 
[+][-]10/09/06 03:03 PM, ID: 17694115Accepted Solution

View this solution now by starting your 30-day free trial. Setting up your free trial is quick, easy, and secure. We will return you to this solution, unlocked, when you're done.

About this solution

Zone: Operating Systems Miscellaneous
Tags: cpu, high
Sign Up Now!
Solution Provided By: Merete
Participating Experts: 3
Solution Grade: C
 
[+][-]10/09/06 03:29 PM, ID: 17694292Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]10/09/06 05:07 PM, ID: 17694778Assisted Solution

Assisted solutions are selected by the member who asked the question as a comment that contributed to their question's solution.

Start your 30-day free trial to view this Assisted Solution or ask the Experts your question.

 
[+][-]10/09/06 10:45 PM, ID: 17696327Assisted Solution

Assisted solutions are selected by the member who asked the question as a comment that contributed to their question's solution.

Start your 30-day free trial to view this Assisted Solution or ask the Experts your question.

 
[+][-]10/10/06 06:51 AM, ID: 17698760Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]10/10/06 10:30 AM, ID: 17700575Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]10/10/06 11:49 AM, ID: 17701204Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]10/13/06 02:11 PM, ID: 17727674Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]10/16/06 04:20 AM, ID: 17737733Expert Comment

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

Start your 30-day free trial to view this Expert Comment or ask the Experts your question.

 
[+][-]10/16/06 06:27 AM, ID: 17738421Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]10/16/06 06:28 AM, ID: 17738433Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]10/24/06 08:09 AM, ID: 17796441Author Comment

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

Start your 30-day free trial to view this Author Comment or ask the Experts your question.

 
[+][-]10/24/06 03:17 PM, ID: 17799852Expert Comment

At Experts Exchange, members can ask their questions to thousands of technology professionals, also known as Experts. Experts compete and collaborate to answer those questions by leaving comments like this one.

Start your 30-day free trial to view this Expert Comment or ask the Experts your question.

 
 
Loading Advertisement...
20091111-EE-VQP-92