Windows 10: 100% CPU usage and high temperatures unless i open task manager

2 Months ago i got a pc and it was running smoothly until 3 weeks ago that i noticed that i was getting 100 cpu usage and temperatures of 60C when my task manager was closed but when i open it my temperatures go back to 40C


All my drivers are updated

Windows 10 Fully updated

Factory reseted 1 day ago


I5-9400F

PC CRASHED 3 TIMES

:)

 

High CPU usage unless task manager opened, but no rootkit detected

I am using Windows 10 (v1903). Whenever I open Task Manager, I see that CPU usage is at 100% -- but then it plummets to ordinary numbers (typically below 20%). This change happens so quickly that I cannot see what task is using so much of the CPU.

The problem seems like the one described in Windows 10 high CPU usage unless task manager is opened. But I have tried the advice given in the answers to that post, and the problem persists. Which makes me wonder whether it is a problem at all. Specifically:

• The following software has turned up no serious problems: MalwareBytes (run from my normal boot drive and again from Hiren's BootCD), ESET online scanner (run from Hiren's BootCD), Norton Endpoint Protection, and McAfee's rootkit detector.
  
• When I use Process Explorer to gauge CPU usage, I don't see a problem. Most of the CPU usage in Process Explorer is attributed to "System Idle Process."
  
• A Windows Defender offline scan just runs, stops for a reason I can't discern, and reboots the computer. It doesn't leave an entry in the "Protection history" section of the Windows Security app. It does leave a log file saying that "On demand scan closed without completion."
  
• GMER rootkit detector crashes with a BSOD, even when run in safe mode and when Windows' built-in virus and threat detection are disabled.
  

Is there a way to identify the process using so much of my CPU? Or should I simply conclude that the Task Manager results are more suggestive of a nuisance than a real problem?

 

Task Manager High CPU Usage

I have the same problem myself with it only happens when I scroll through task manager and open and close it. I don't know this for sure but the reason this probably happens is that you may have a lot of processes running and task manager is using a lot
of the CPU to process the usage of each program.

What I have done is disable data that I don't need to see like network usage and GPU usage and it drops the CPU usage a bit. I have also enabled everything and scrolled up and down on it and task manager uses almost twice as much.

I would suggest disabling everything but CPU, disk, and RAM, (I would not suggest having GPU on because it is almost always at 99% unless you have FPS limits).

 

high cpu usage when task manager is open

hi, i have done a clean boot and sfc clean-image restore etc nothing out the ordinary my computer is up to date also i use a program called open hardware to monitor mt temps / usage and it never is pinned near 70-100% there is spikes upon launching games
etc but i assume that's normal even when i bring open the task manager and its using up to 30-40% cpu usage in other programs showing cpu usage it isn't as high as what windows task manager is telling me