Windows 8.1: CPU always runs 100%

check event manager to see error messages

 

From the screen, SnagIt is causing the most CPU use, try uninstalling it ?

 

I think Snagit is cause of high usage.... stop that & then see...

 

SnagIt indeed uses up the most maybe search for an update for that program

 

Explain which CPU use and how strong is CPU. Also SnagIt is an issue.

 

you have no original Start button on 8.1. Perhaps system runs wild because it is missing

 

What is the problem? You can see clearly which processes are using the CPU

 

try in safe mode and see what's happening.

 

could be drivers?

 

do you run any AV progs?

 

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Your system might have got a virus...it happened on my PC once & the CPU was always getting 100% used...try scanning your PC using Hitman Pro....BTW:-From the last task manager pic it seems that the system processes is keeping the CPU busy

 

It's not showing all processes? I'm no mathematician but adding up all the activity shown there in CPU section does not equal 99%? Someone else is running and not showing.

Find out what it is (most likely virus scanner / defender or something). The best thing to do is just Copy C:\Users to another HDD (remove the unwanted crap) And Check see hidden files in C:/ and then backup C:/ProgramData also (file is hidden).

Then reinstall Windows (clean install) and activate.
Then copy the Users back (make sure you use same username) Remember to remove any unwanted crap.
Reinstall software, drivers, applications.
Then copy the ProgramData file back (Make sure to remove any crap)

This should leave your program data intact like to make it so path settings and stuff or the view of what tabs are disabled in some apps are saved. It should also restore all saved game data and stuff.

 

In my case the cpu is always in 100% but is fake, for me is because i have idle processor on.. if i turn off everything is fine.. you can try maybe we have the same Issue...


1. We have to change the registry.
Typing in the command line "regedit", you go to the registry key:
HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Power \ PowerSettings \ 54533251-82be-4824-96c1-47b60b740d00 \ 5d76a2ca-e8c0-402f-a133-2158492d58ad

2. Included option in this branch will enable and disable the idle processor. In this case, it should be included.
To enable one or another hidden parameter, it is necessary to find and edit the value DWORD, changing its value SettingValue from 1 to 0. (or just Add a new dword, name it "Attributes" its value should be 0).

3. Then, through the control panel - power - in the advanced settings of your actual power plan, select "power management processor"
There will be an option disabling idle processor and just do it, in my case works without restart the PC.

You can test with process explorer too, because task manager is buggy.. sorry for my bad english