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svchost.exe using 50% CPU


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47 replies to this topic

#1 debodun

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Posted 12 April 2016 - 04:45 PM

I noticed today that one of the svchost processes had been running at 50% CPU all day (see screenshot of Task Manager). Also, I can't manually install MalwareBytes updates (get error message) or update MSSE defs (just hangs at SEARCHING). I tried rebooting, but that same svchost process just goes back to 50% CPU usage. I right clicked on the svchost in Task Manager, and then Go To Services. The ones highlighted in blue are:
AeLookupSvc
Appinfo
BITS
iphlpsvc
LanmanServer
MMCSS
ProfSvc
Schedule
SENS
ShellHWDetection
Themes
winmgmt
wuauserv


What's going on and is there a fix?



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#2 slovokia

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Posted 12 April 2016 - 05:31 PM

I have seen something similar today (4/12/2016 3PM Pacific Time) on a system running Windows 7 Home Premium 64 Bit.

 

I isolated each service in a separate process as described here: https://blogs.technet.microsoft.com/askperf/2009/04/10/prf-high-cpu-svchost-exe/

 

I then determined that the offending service was wuauserv.

 

I then ran the Windows Update troubleshooting tool: http://windows.microsoft.com/en-US/windows7/Open-the-Windows-Update-troubleshooter

 

That seemed to clear the problem temporarily. However when Windows checks for updates again the problem will reoccur. So I have temporarily shut off Windows Update - I had previously configured it to "Download Updates but let me choose when to install them".

 

My working hypothesis is that there is a temporary problem with Windows Update for Windows 7. Hopefully Microsoft will get a clue and fix the problem. Given that it is the second Tuesday of the month I suspect Microsoft is pushing out some updates today. 



#3 debodun

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Posted 12 April 2016 - 05:43 PM

Tried the troubleshooting tool. Didn't help. How do you disable windows updates?

Attached Files


Edited by debodun, 12 April 2016 - 05:51 PM.


#4 feckingcomputer

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Posted 12 April 2016 - 07:06 PM

I just registered to let you know I'm having the same problem today. My laptop is burning up and making sounds like a vacuum cleaner, which is both stressing me out and giving me an enormous migraine. I've isolated it to the wuauserv process through Resource Manager (100% CPU usage!) and have tried restarting and stopping it to no avail. I've also restarted my computer several times and ran the update troubleshooting tool (which says there's a problem with the latest update). What a pain in the ass. I've also run system scans to make sure I haven't picked up any new malware or viruses. The best I can do now is keep manually stopping the process every time it crops up again every few minutes.  :(

 

Like slovakia said, hope Microsoft gets a clue and fixes it soon.

 

EDIT: To disable Windows Update, just search for windows update and change settings to update never and untick the Windows Update box for good measure.


Edited by feckingcomputer, 12 April 2016 - 07:15 PM.


#5 JohnC_21

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Posted 12 April 2016 - 07:33 PM

Same issue here, svchost running at 50% and manually doing a Windows Update is constantly trying to find something. Microsoft has done something with their update servers lately. I think priority is being given to Windows 10. 


Edited by JohnC_21, 12 April 2016 - 07:33 PM.


#6 debodun

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Posted 12 April 2016 - 08:00 PM

The Action Center says to download an important update - NET Framework 4.6.1. I already have this installed. What's the deal with that?



#7 slovokia

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Posted 12 April 2016 - 08:40 PM

FYI - Just for grins I turned Windows 7 update on again. It took approximately 1.5 hours of cpu from 1/4 of an i5-750 before wuauserv finally stopped consuming CPU. Now I am finally applying the updates - It will be interesting to see if things work properly. Either Microsoft is deliberately making life difficult for Windows 7 users or the folks that manage Windows Update are not as competent as they used to be.

 

O.K. The update seemed to work properly.


Edited by slovokia, 12 April 2016 - 08:55 PM.


#8 JohnC_21

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Posted 12 April 2016 - 08:59 PM

I gave up looking for updates. Hopefully the Update will appear in the System Tray tomorrow.



#9 feckingcomputer

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Posted 12 April 2016 - 09:03 PM

I think priority is being given to Windows 10. 

 

I wish there was a way to get Microsoft's attention and report the issue directly, but I can find no such form on the website. Windows Update is disabled for now.


Edited by feckingcomputer, 12 April 2016 - 09:05 PM.


#10 debodun

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Posted 13 April 2016 - 06:30 AM

Today the svchost.exe is still using 50% CPU. Checked Action Center. Says I need to download NET Framework 4.6.1. I already have that version installed. How can I stop it saying I need that when I already have it?



#11 JohnC_21

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Posted 13 April 2016 - 07:48 AM

I am not sure why you are getting that error but today I booted the computer and svchost (netsvcs) is still running at 50%. This is ridiculous. Well, I have one computer running linux, I guess this one will be too. 

 

Edit: @debodun, have you tried running the Windows Update Readiness Tool?

 

https://www.microsoft.com/en-us/download/details.aspx?id=20858

 

Update: Disabling the Windows Update Service Solved the problem but of course this is only a temporary solution. At least the laptop fan isn't running itself to death.


Edited by JohnC_21, 13 April 2016 - 08:01 AM.


#12 debodun

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Posted 13 April 2016 - 12:01 PM

Was able to download updates today (about 20 of them) in 3 groups. CPU usage back to normal, for now. Thanks for all responses.


Edited by debodun, 13 April 2016 - 04:10 PM.


#13 feckingcomputer

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Posted 13 April 2016 - 06:08 PM

I'm still getting the same bullbleep errors. Did you do anything specific to successfully get the updates, or just let the computer run its full course?



#14 JohnC_21

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Posted 13 April 2016 - 06:48 PM

Take a look at this thread. I downloaded and installed the latest Windows Update Agent, Client, and KB3102810. Still nothing. I still have the Windows Update Service disabled or I get 50% CPU usage on svchost. This is definitely a Microsoft Windows 7 issue.

 

http://www.bleepingcomputer.com/forums/t/608538/windows-7-clean-install/



#15 SleepyDude

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Posted 14 April 2016 - 03:33 AM

Take a look at this thread. I downloaded and installed the latest Windows Update Agent, Client, and KB3102810. Still nothing. I still have the Windows Update Service disabled or I get 50% CPU usage on svchost. This is definitely a Microsoft Windows 7 issue.

 

http://www.bleepingcomputer.com/forums/t/608538/windows-7-clean-install/

 

Update the Windows Update Client to the latest version https://support.microsoft.com/en-us/kb/3138612


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