Windows 10: Two monitors w/ different resolutions causing high CPU usage

I noticed today that Windows Explorer was using about 10-15% of my CPU. After trying a lot of different things, it seems to be caused by having two monitors with different resolutions. If I unplug either monitor, CPU usage drops to normal (below 1% for WE). If I set the monitors to duplicate instead of extend, it drops to normal. Finally, if I set my 1440p monitor to 1080p (the resolution of my secondary monitor), CPU usage drops to normal.

Things I have tried:

I have completely reinstalled my graphics card drivers using DDU.

I went into selective startup and disabled things until the issue was fixed. Disabling the "shell hardware detection" service fixed the CPU usage... but of course this prevents me from having any autoplay functionality.

Any ideas are appreciated (though I would like to avoid having to do an OS re-install at this point if possible).

Thank you!

:)

 

WIN10 1703 update cause Explorer.exe high CPU usage

Hi,



Glad you reached out. First, we would like to know if Explorer.exe
is the only cause of high CPU usage. Because the common cause of high CPU usage are the following:

- Windows 10 Memory leak after the update.

- Driver incompatibilities after the update.

- Multiple startup applications

• 
  

We'll be waiting for your update.

 

High CPU Usage in Windows 10 Version 1703

Hi,

There are programs that cause high CPU usage by creating multiple processes which consume resources on your computer. For us to provide the best resolution possible, we'll be needing additional information:

• Are you using a third-party software or program such as antivirus?
• Are there any changes made on your computer prior to the issue?
• What troubleshooting steps have you done so far?

We'll keep an eye out for your response.

 

High CPU usage

Hi Tusar,

The Task manager shows high CPU usage for core Windows process which can be used by other application. In order find out which applications might be using more resources through these services, I would suggest you to open 'Resource monitor' and check. In
task manager, go to the 'Performance' tab and click on the option 'Open Resource monitor' option at the bottom. Click on the CPU tab and then select the processes which showed high CPU usage in task manager. No expand the 'Services', associated handles section
and post us a screenshot so that we can check the details and help you accordingly.

In the meantime, I would also suggest you to boot the PC in safe mode and check if the issue persists. Refer to this article:

http://windows.microsoft.com/en-us/windows-10/change-startup-settings-in-windows-10#v1h=tab01