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Windows 7: high cpu usage - unknown cause

30 May 2010   #1
pontifex

win7
 
 
high cpu usage - unknown cause

Hi,
I get regularly high CPU usage without any visible reason in task manager. A desktop gadget shows the CPU usage between 50 - 70 % but in the task manager there are two or three processes with 1 % each.
I see also higher power consumption. In normal idle state I have some 18 W, with the CPU usage increased it is 40 W. And of course, the notebook is pretty noisy at that time because the CPU temperature runs to 50 C. (Usual is 15 - 20 C.)
The notebook is HP ProBook 6540b - Intel i5, Win 7 Pro. It is new and I am quite disappointed I cannot take it to a library because of the noise.

Because I see nothing in the task manager I am not able to determine the cause of the problem.
If anybody has any ideas what to do, I would be very glad. Thx.


My System SpecsSystem Spec
.
30 May 2010   #2
Jonathan_King

Windows 7 Professional x64
 
 

Welcome!

I suggest ending all the third-party processes one at a time, next time it happens. Google the name of the process, and if it's not a part of Windows, right-click and select End Process.
My System SpecsSystem Spec
30 May 2010   #3
kucing13

 

can you post a snip of your task manager when it reach high usage . I'll appreciate it
My System SpecsSystem Spec
.

30 May 2010   #4
richc46

Microsoft Community Contributor Award Recipient

Windows 10, Home Clean Install
 
 

Quote   Quote: Originally Posted by Jonathan_King View Post
Welcome!

Welcome to the Forum Pontifex

I suggest ending all the third-party processes one at a time, next time it happens. Google the name of the process, and if it's not a part of Windows, right-click and select End Process.
Excellent and informative post as usual. I would just like to add that pontifex may have to click on show process from all users, in the lower left of task manger, first. I make this comment because just recently, I have read 2 posts where this fact was not known.

Good luck to all.
My System SpecsSystem Spec
30 May 2010   #5
Victek

Windows 7 x64
 
 

Quote   Quote: Originally Posted by pontifex View Post
Hi,
I get regularly high CPU usage without any visible reason in task manager. A desktop gadget shows the CPU usage between 50 - 70 % but in the task manager there are two or three processes with 1 % each.
I see also higher power consumption. In normal idle state I have some 18 W, with the CPU usage increased it is 40 W. And of course, the notebook is pretty noisy at that time because the CPU temperature runs to 50 C. (Usual is 15 - 20 C.)
The notebook is HP ProBook 6540b - Intel i5, Win 7 Pro. It is new and I am quite disappointed I cannot take it to a library because of the noise.

Because I see nothing in the task manager I am not able to determine the cause of the problem.
If anybody has any ideas what to do, I would be very glad. Thx.
.
I suggest trying System Explorer which will enable you to see processes in much more detail then the Task Manager.

System Explorer Homepage

System Explorer is freeware, and has other great capabilities in addition to process viewing.
My System SpecsSystem Spec
31 May 2010   #6
pontifex

win7
 
 

richc46 is right. I didnot switch the manager to see processes of all users. Now, I see two are responsible:
WmiPrvSE.exe user: Network service
and svchost.exe user: system
If I understand it well, the both are a part of windows. But they still seem to increase the cpu usage randomly, without any specific action from my side...


Attached Images
high cpu usage - unknown cause-task-manager-1.png high cpu usage - unknown cause-task-manager-2.png 
My System SpecsSystem Spec
31 May 2010   #7
Victek

Windows 7 x64
 
 

Quote   Quote: Originally Posted by pontifex View Post
richc46 is right. I didnot switch the manager to see processes of all users. Now, I see two are responsible:
WmiPrvSE.exe user: Network service
and svchost.exe user: system
If I understand it well, the both are a part of windows. But they still seem to increase the cpu usage randomly, without any specific action from my side...
.
Have you done a scan for malware with something like MBAM or SAS? It's always good to check because malware can masquerade as system files.
My System SpecsSystem Spec
31 May 2010   #8
richc46

Microsoft Community Contributor Award Recipient

Windows 10, Home Clean Install
 
 

Victek, excellent point.
svchost trojan/virus/spyware/malware!? - Tech Support Guy Forums

So astute, that I think it deserves rep.
My System SpecsSystem Spec
31 May 2010   #9
pontifex

win7
 
 
no malware

I scanned the computer for malware with MBAM. Nothing found.
My System SpecsSystem Spec
31 May 2010   #10
richc46

Microsoft Community Contributor Award Recipient

Windows 10, Home Clean Install
 
 

Ok then we have to assume that the increased cpu usage is normal for the OS.
http://www.howtogeek.com/howto/windo...is-it-running/

For Vista and 7


http://www.technibble.com/how-to-fix...u-memory-leak/
My System SpecsSystem Spec
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 high cpu usage - unknown cause




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