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CPU 100% Computer very slow

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#1 ricj7


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Posted 20 May 2013 - 02:12 AM

Hello All,


I have windows 7 on the dell laptop with 2 gigs of memory. 


However, after few pages on the firefox, the computer becomes very slow and freezes pretty much.


I press Cntr-Alt-Del to go to the task manager and see that CPU is running constantly at 100%, Memory usage hovers around 70%. 


When I click at "show all the processes from all users"  one of the items svchost.exe shows running high on memory usage.  There are many svchost.exe programs running also. 


I do not know what the problem is.  I do not visit any porn type sites, so have no clue from where the virus (if any has hit). 


I tried to run malwarebytes, superantispyware, have AVG free version running all the time.  malware had to be closed due to computer freezing, superspyware gave some 400 odd threats which were removed. 


However, little change in CPU usage computer freezing out pretty much. 


Thanks all! 

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#2 Anshad Edavana

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Posted 20 May 2013 - 03:14 AM



Svchost.exe is a Windows process that loads and run dll based services. Malwares may often create services runs under svchost to hide it's presence. Some faulty services may also cause svchost 100% CPU issue but you should make sure the system is virus free before doing any other steps.


As a first step, follow the below instructions.


- Restart the system and keep pressing F8 until you see an "Advanced Boot Options" menu. From there select "safe mode with networking" and hit "Enter" key to boot. Update malwarebytes and run a full system scan with it. 


- If malwarebytes failed to detect any viruses, post a malware removal request in the "Malware logs" section by following the instructions in the below link. 



Edited by hamluis, 20 May 2013 - 08:35 AM.
Fixed tranposition - Hamluis.

#3 ricj7

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Posted 20 May 2013 - 07:53 PM

I tried researching the internet and found this answer that applied to me I think.  Having a cluttered desk, I was not leaving much space behind the laptop for hot air to exit.  This was heating up the processors and CPU would should 100% and computer would refuse to work smoothly or worst even freeze. 


Making space has helped.  CPU usage is jumping all over from 7 to 100% and not freeze occuring or slowdowns.  Not sure but it seems that was the problem.  Will run malwarebytes soon and get the report. 


Thanks for the inputs.  Great forum!

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