svchost.exe 100% CPU ntdll.dll
I have Win7 Ultimate. Process Explorer show 2 thread for svchost.exe with 100% CPU usage. 1: ntdll.dll!RtlIsCriticalSectionLockedByThread+0x9f0 (about 50% CPU) 2: ntdll.dll!RtlRegisterThreadWithCsrss+0x197 (about another 50% CPU) nuance: After I go to sleep my comp and start after sleep - this problem are leaves. I don't have virus: it say malwarebytes and MSE. What is it? And how to resolve this problem? I may kill this thread, but this income in next time. Help!
December 6th, 2009 2:13am

I have the same problem...... awaiting reply to yr. post......
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December 6th, 2009 10:18pm

Svchost.exe is a generic process working as a host for other processes turning from Dlls, there may be several entries for this process. Symptoms like yours are generally the result of IE 3rd party add-on's. Disable IE add-on's and see if your problem doesn't disappear.MCSE, MCSA, MCDST
December 7th, 2009 4:14am

Thanks for reply..... but, the problem arises even before i start a webbrowser and I don`t use IE.... but, Firefox. But, thanks... I will look further for solutions.
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December 7th, 2009 8:15am

No, cdobbs. I think this situation connected with windows update. I don't use IE.
December 7th, 2009 10:01am

Does Task Manager report the same CPU usage? If so, please disable all startup items and third party services when booting. This method will help us determine if this issue is caused by a loading program or service. Please perform the following steps:1. Click the Start Button type "msconfig" (without quotation marks) in the Start Search box, and then press Enter. Note: If prompted, please click Continue on the User Account Control (UAC) window.2. Click the "Services" tab, check the "Hide All Microsoft Services" box and click "Disable All" (if it is not gray). 3. Click the "Startup" tab, click "Disable All" and click "OK". Then, restart the computer. When the "System Configuration Utility" window appears, please check the "Don't show this message or launch the System Configuration Utility when Windows starts" box and click OK. Does the issue occur? If the issue disappears, one of your startup programs can be the root cause. However, if the issue persists in Clean Boot Mode, please remember the PID of the problematic svchost.txt program. Then, run the command "tasklist /m > %userprofile%\Desktop\task.txt". Please open the file task.txt in Desktop, find the correct PID. There will be series of *.dll files listed under this process. Please check them one by one and find if there is any third party *.dll file, and if exists rename the *.dll to *.dl_.Arthur Xie - MSFT
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December 8th, 2009 11:53am

Now, we are getting somewhere, but not exact. I did as described - disabled all 3rd party, but still the CPU-load was close to 100%. Then I noted the PID (816), proceeded and got the textfile. But, the PID 816 isn`t listed there! Now what? I appreciate all your help..... Thanks. Bjoern and the next time I restarted my PC the PID was 528.......
December 8th, 2009 5:02pm

I don't found that PIDtoo. I think this problem source is computer configuration. On another computer with the same installed program I don't have this problem. It is my computer: More details about my computer Component Details Subscore Base score Processor AMD Athlon(tm) 64 Processor 3200+ 3,9 3,2 Determined by lowest subscore Memory (RAM) 2,00 GB 5,0 Graphics NVIDIA GeForce 6150SE nForce 430 (Microsoft Corporation - WDDM) 3,2 Gaming graphics 527 MB Total available graphics memory 3,2 Primary hard disk 99GB Free (149GB Total) 5,7 Windows 7 Ultimate System Manufacturer System manufacturer Model System Product Name Total amount of system memory 2,00 GB RAM System type 32-bit operating system Number of processor cores 1 64-bit capable Yes Storage Total size of hard disk(s) 335 GB Disk partition (C:) 99 GB Free (149 GB Total) Disk partition (D:) 134 GB Free (186 GB Total) Media drive (E:) CD/DVD Media drive (F:) CD/DVD Graphics Display adapter type NVIDIA GeForce 6150SE nForce 430 (Microsoft Corporation - WDDM) Total available graphics memory 527 MB Dedicated graphics memory 32 MB Dedicated system memory 0 MB Shared system memory 495 MB Display adapter driver version 8.15.11.8593 Primary monitor resolution 1280x1024 DirectX version DirectX 9.0 or better Network Network Adapter NVIDIA nForce Networking Controller Network Adapter VMware Virtual Ethernet Adapter for VMnet1 Network Adapter VMware Virtual Ethernet Adapter for VMnet8
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December 8th, 2009 7:18pm

Please launch Task Manager, then click "Show processes from all users". Please find the svchost.exe processes that cost 50% of CPU resources. You can remember the PID of them. Then you can check loaded *.dll information If you would like to check which system services run on the process, you can run the following command. tasklist svc Then you can find the corresponding process by the PID and find which services that are running on it.Arthur Xie - MSFT
December 10th, 2009 6:47am

Why not create a dump file? In task manager right click on the svchost.exe process and select "Create Dump File" for analyzation.Seasons greetings!
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December 10th, 2009 8:19am

How to analize this huge DMP file?
December 10th, 2009 10:07am

http://www.microsoft.com/whdc/devtools/debugging/default.mspxEnjoy! Seasons greetings!
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December 10th, 2009 11:49am

Hi! I didn`t want to use more time on this problem. I reinstalled Win7, for offcourse I had all "my documents" on a different partition. This took less than 1/2 hour. Well, reinstalling the programs took a few hours, but I am now back to about 90% of what I had installed. Everything works just grat again. Now, if I find out what caused the 100% load, when installing the remaining 10% of my programs - I will let you guys know :-) Good luck with your troubles.... Bjoern (Norway)
December 10th, 2009 12:12pm

If it happens againyou can operate insafe mode and observe any difference. You can also use system configuration interface to disable certain startup, driverand service itemsto narrow down the cause.Seasons greetings!
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December 10th, 2009 12:30pm

Defcon: I tried ALL that..... but, thanks :-) And all that takes longer than I used to reinstall. Fresh now :-)
December 10th, 2009 1:02pm

I did, it (reinstal win7). But problem is not gone. It not often, but was.
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December 10th, 2009 1:33pm

OK... so I had the same problem... I finally fed up and end the procces via the task manager. This f****d up my aero and internet, BUT after a minute or so the system went back to normal and WITHOUT SVCHOST!!!! Hope this is usefull
March 5th, 2010 12:12am

i get the same problem, i have not payed too much attention to it as i have been busy with various other projects at the moment. my part time solution is simply to monitor my cpu usage and whenever it rises to near 100% check and end the svchost process, this fixes my problem but occationaly it will reapear later. it doesn't always occur right after startup and often happens while i have firefox open but this could be a coincidence as i am constantly browsing. i hope this has been of some use.
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April 9th, 2010 1:38pm

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