cpu usage 100 % for NT kernel & system

Question

CPU usage on task manager is 100 % for NT kernel & system so my PC goes very slow

AMD Athlon X2 7750 2.7 Ghz

RAM 2 Ghz

Answer 1

Hi,

If you suspect malware :

No one program can be relied upon to detect and remove all malware. Added that often easy to detect malware

is often accompanied by a much harder to detect and remove payload. So its better to be overly thorough now

than to pay the high price later. Check with these to an extreme overkill point and then run the cleanup only when

you are very sure the system is clean.

These can be done in Safe Mode - repeatedly tap F8 as you boot however you should also run them in

regular Windows when you can.

Download malwarebytes and scan with it, run MRT, and add Prevx to be sure it is gone. (If Rootkits run UnHackMe)

Download - SAVE - go to where you put it - Right Click on it - RUN AS ADMIN

Malwarebytes - free

http://www.malwarebytes.org/

Run the Microsoft Malicious Removal Tool

Start - type in Search box -> MRT  find at top of list - Right Click on it - RUN AS ADMIN.

You should be getting this tool and its updates via Windows Updates - if needed you can download it here.

Download - SAVE - go to where you put it - Right Click on it - RUN AS ADMIN

(Then run MRT as above.)

Microsoft Malicious Removal Tool - 32 bit

http://www.microsoft.com/downloads/details.aspx?FamilyID=AD724AE0-E72D-4F54-9AB3-75B8EB148356&displaylang=en

Microsoft Malicious Removal Tool - 64 bit

http://www.microsoft.com/downloads/details.aspx?FamilyId=585D2BDE-367F-495E-94E7-6349F4EFFC74&displaylang=en

also install Prevx to be sure it is all gone.

Download - SAVE - go to where you put it - Right Click on it - RUN AS ADMIN

Prevx - Home - Free - small, fast, exceptional CLOUD protection, works with other security programs. This is

a scanner only, VERY EFFECTIVE, if it finds something come back here or use Google to see how to remove. 

http://www.prevx.com/   <-- information

http://info.prevx.com/downloadcsi.asp  <-- download

PCmag - Prevx - Editor's Choice

http://www.pcmag.com/article2/0,2817,2346862,00.asp

Try the trial version of Hitman Pro :

Hitman Pro is a second opinion scanner, designed to rescue your computer from malware (viruses, trojans,

rootkits, etc.) that have infected your computer despite all the security measures you have taken (such as

anti virus software, firewalls, etc.).

http://www.surfright.nl/en/hitmanpro

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If needed here are some online free scanners to help

http://www.eset.com/onlinescan/

http://onecare.live.com/site/en-us/default.htm

http://www.kaspersky.com/virusscanner

Other Free online scans

http://www.google.com/search?hl=en&source=hp&q=antivirus+free+online+scan&aq=f&oq=&aqi=g1

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Also do these to cleanup general corruption and repair/replace damaged/missing system files.

Run DiskCleanup - Start - All Programs - Accessories - System Tools - Disk Cleanup

Start - type this in Search Box ->  COMMAND   find at top and RIGHT CLICK  -  RUN AS ADMIN

Enter this at the prompt - sfc /scannow

How to analyze the log file entries that the Microsoft Windows Resource Checker (SFC.exe) program

generates in Windows Vista cbs.log

http://support.microsoft.com/kb/928228

Run checkdisk - schedule it to run at next start and then Apply OK your way out then restart.

How to Run Check Disk at Startup in Vista

http://www.vistax64.com/tutorials/67612-check-disk-chkdsk.html

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If any Rootkits are found use this thread and other suggestions. (Run UnHackMe)

http://social.answers.microsoft.com/Forums/en-US/InternetExplorer/thread/a8f665f0-c793-441a-a5b9-54b7e1e7a5a4/

Hope this helps.

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Rob - Bicycle - Mark Twain said it right.

Answer 2

Hi,

See next message if you suspect malware has a role.

CTRL SHIFT ESC or Right Click Taskbar - Task Manager.

Task Manager - Performance tab - Resource Monitor - any info on what might be running on the

CPU area (click little down area on right side).

What happens in Safe Mode - repeatedly tap F8 as you bootup?

How to troubleshoot a problem by performing a clean boot in Windows Vista

http://support.microsoft.com/kb/929135

How to troubleshoot performance issues in Windows Vista

http://support.microsoft.com/kb/950685

Optimizing Microsoft Windows Vista Performance

http://support.microsoft.com/kb/959062

To see all that is loading bootup - wait a few minutes without doing anything - then Right Click TaskBar -

Task Manager - take a look at Appplications - Processes - Services - this is a quick reference (if you have

a little box on Lower Left - Show for All Users then check that).

How to Check and Change the Startup Programs in Vista

http://www.vistax64.com/tutorials/79612-startup-programs-enable-disable.html

A quick check to see which are loading is Method 2 there - using MSCONFIG then post a list of those here.

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Tools that should help :

Process Explorer - Free - Find out what files, registry keys and other objects processes have open, which DLLs

they have loaded, and more. This uniquely powerful utility will even show you who owns each process.

http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx

Autoruns - Free - See what programs are configured to startup automatically when your system boots and you

login. Autoruns also shows you the full list of Registry and file locations where applications can configure auto-

start settings.

http://technet.microsoft.com/en-us/sysinternals/bb963902.aspx

Process Monitor - Free - Monitor file system, Registry, process, thread and DLL activity in real-time.

http://technet.microsoft.com/en-us/sysinternals/bb896645.aspx

There are many excellent free tools at Sysinternals

http://technet.microsoft.com/en-us/sysinternals/default.aspx

WhatsInStartUP - Free - This utility displays the list of all applications that are loaded automatically when Windows

starts up. For each application, the following information is displayed: Startup Type (Registry/Startup Folder),

Command -Line String, Product Name, File Version, Company Name, Location in the Registry or file system,

and more. It allows you to easily disable or delete unwanted programs that runs in your Windows startup.

http://www.nirsoft.net/utils/what\_run\_in\_startup.html

There are many excellent free tools at NirSoft

http://www.nirsoft.net/utils/index.html

Window Watcher - Free - Do you know what's running on your computer? Maybe not. The Window Watcher tells all, reporting every window created by every running program, whether the window is visible or not.

http://www.karenware.com/powertools/ptwinwatch.asp

Many excellent free tools and an excellent newsletter at Karenware

http://www.karenware.com/

Hope these help.

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Rob - Bicycle - Mark Twain said it right.

Answer 3

Just change battery in motherboard , had same problem , cpu permanately running at 50 percent, this cured mine, was affecting the cmos settings

Answer 4

Hi,

follow my guide here:

http://www.msfn.org/board/index.php?showtopic=140263

and make a trace with xperf. Which driver is causing the high usage?

André

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"A programmer is just a tool which converts caffeine into code" CLIP- Stellvertreter http://www.winvistaside.de/