Windows 10: Task Manager incorrectly claims 100% CPU usage

Whenever I open task manager, It will constantly say that my CPU usage is at 100% and doesn't seem to dip below 99%, even when otherwise idle. However, my PC is not having any performance issues I would expect with an overloaded CPU. I can run games and benchmarks without issues and results appear to be perfectly normal. Performance monitor, MSI Afterburner and GeForce Experience overlay all suggest my idle CPU usage rarely peaks above 5%. I can only assume there is a bug in Task Manager.I am running win 10 home on a custom PC with an MSI z490 Gaming Plus motherboard, i7-10700F 2.9GHz 8-core 1

:)

 

Task Manager showing 100% CPU usage

Task Manager showing 100% CPU usage. A few days after I built my PC, all of a sudden task manager started showing 100% CPU usage no matter what programs are running and it was also showing very high power usage. I ended up temporarily fixing the issue after I did a full fresh install of Windows, 2 months later and now the 100% CPU issue has returned. I checked sensor connections and updated my bios with no luck. I have NO performance issues, I used the Intel Extreme Tuning Utility and it showed no high CPU usage. CPU and motherboard specs are below:

Windows 10 Home 64-bit

Motherboard: Z690 UD DDR4

BIOS: F7a

Processor: 12th Gen Intel(R) Core(TM) i9-12900K (24 CPUs), ~3.2GHz

Has anyone else run into this issue? Does anyone know of possible solutions?

 

CPU Usage 100% until Task Manager is opened

Hi,

I have a i9-9900k 32gb Windows Pro 21H2 19044.1586 desktop that randomly starts freezing up. As soon as I hit task manager, I can see the CPU is 100% for a second after opening, after which it goes down to normal levels and I can use my PC normally.

I have searched for answers and found thread Redirecting but that's from 2015 and it's now closed. I have tried the solution listed there and on the last step I'm getting access conflicts due to files being in use. What else can I try? Or if that solution is still valid, what can I do about the files that can't be accessed due to being in use?

Thank you

 

Task Manager Incorrect CPU Usage

So for roughly the past couple of weeks, I have been having issues with task manager giving me incorrect readings on the CPU usage. Before noticing this issue, I have been running my 9900K at 4.8 GHz all core with an AVX offset of 1. Initially, reducing
my clock speed by 100 MHz down to 4.7 GHz all core (AVX offset 0) solved the problem for a couple of weeks, but the problem has now resurfaced despite the CPU literally running at specified stock speeds.

The Task Manager program is incorrectly reporting CPU usage spiking up to 100% at times, sometimes accompanied by the display turning into a black screen for a half-second while playing SCP: Secret Laboratory. Meanwhile, other programs that were running
at the time such as Google Chrome or DIscord turn into black windows and require restarting. Other programs such as HWiNFO64, Corsair iCUE, and Process Explorer are reporting much lower CPU usage percentages.

Any ideas on what is causing Task Manager to behave like this? I thought Windows shipped out an update that fixed the broken Task Manager, but apparently not for me. I have already tried a clean installation of Windows 10 Pro to no avail.

CPU: i9-9900K @ 4.7 GHz all core

RAM: 4x8 GB @ 3200 MHz, XMP I

Motherboard: Asus ROG Maximus XI Formula, BIOS - American Megatrends Inc. 0905, 4/10/2019

Windows 10.0.17763 Pro Version 1809

OS Build 17763.437

Full Desktop Parts List: https://pcpartpicker.com/list/Cz87LJ





This was taken while running a game (SCP: Secret Laboratory, SCPSL.exe). Something seems off with the process explorer too since the game should be the highest in CPU usage, and the CPU use of the processes don't add up to 100%. I have seen this occur when
the computer freezes for a half-second for no apparent reason.





This was also taken while running the same game mentioned above, except this time only the Task Manager is reporting an incorrect CPU usage while Process Explorer says otherwise.





This image shows Task Manager claiming that the CPU frequency is being throttled to 3.6 GHz. CPU-Z is reporting a clock speed of about 4.7 GHz. Task Manager also seems to think CPUs #8 and #9 (starting from #0) are going crazy. I've checked both CPUs in
HWiNFO64 and Process Explorer and found nothing wrong with them.





This image is another example of incorrect CPU usage where the actual CPU usage is much less than 50%.