Windows 10: 100% CPU Usage constantly on brand new i7 9700K

Hi there. In the past week my PC has developed the problem of 100% CPU usage constantly. Multiple applications and processes are trying to use the most CPU power, it's not just one. I have reinstalled windows and uninstalled display drivers to reinstall again in the hope of fixing this, but with no success. Is there any solutions to the problem? Thanks.



:)

 

CPU Usage Constantly at 100%

So I tried downloading the hotfix here Z97-A/USB 3.1 | Motherboards | Asus but it didn't do any good.

I did selective startup via Diagnostic Startup in System Configuration, and there were no problems in CPU usage when I did that. Resumed to normal startup, same issues.

Startup programs: Just Dropbox, OneDrive, and AutoHotKey.





Typical resource hogs:





Honestly this makes no sense.... appreciate the help thus far, hopefully this info helps.

Edit: whoa, quick update. I used a CPU stress tester almost immediately after I posted this, and after it happened, it seems to have fixed the problem... weird, we'll see how long this lasts....

 

CPU constantly at 100%, but in Process Explorer usage is around 5%

Task Manager shows CPU usage constantly at 100%, but Process Explorer shows CPU usage at about 5%. I've tried the solution presented in CPU Constantly at 100% In Task Manager, But Not in Process Explorer, but it did not work for me. When I reboot the PC into Safe Mode, though, everything is OK.

How can I resolve the discrepancy?

 

cpu usage at 100%

CPU usage at 100% from start up for no apparently good reason. Service Host appears to be the problem but I cant narrow it down more than that at present.

Any suggestions?

I am using Windows 10 full release version 64 bit.