Windows 10: High CPU Usage (& fan noise) Drop Drastically on Opening Task Manager

I am using Windows 10 in ASUS ZenBook UX305. The fan of my laptop runs quite loud in general but it drops down drastically every time I open the task manager. The sudden drop in CPU usage can be seen immediately after opening the task manager. I have run Malwarebytes and Eset online scan and quarantined the threats found. But the suspicious behaviour of CPU usage has not changed. Please help.

:)

 

Windows Defender's CPU Hogging is driving me nuts!

Take a look at these articles

https://www.drivethelife.com/windows-10/windows...

https://www.groovypost.com/howto/stop-whats-rev...

Top 10 Ways to Fix High CPU/RAM/Memory Usage after Windows 10 Update
https://www.drivethelife.com/windows-10/fix-hig...

Fix Windows 10 High Memory Usage/Leak after the Creators Update
https://www.drivethelife.com/windows-10/fix-hig...

Fix WMI Provider Host High CPU Usage after Windows 10 Creators Update
https://www.drivethelife.com/windows-10/wmi-pro...

Fix Computer Fan Noise Due to High CPU Usage on Windows 10
https://www.drivethelife.com/windows-10/fix-com...

Next time it happens, give defender a kick in the teeth. Go into Task Manager, end the task the start it again from the start menu (if it doesn't automatically restart).

You could also try an application like Process Lasso:
https://bitsum.com/

It allows you to set controls on applications like limiting CPUs it uses and total CPU % used. I don't know if it will work on Defender

 

Windows 10 i9 CPU stuck at 100%

Exactly what Windows version and build do you have. You can Run WINVER to see it.

Note: you can click on the column titles in in Task Manager to change the sort order. So for example, you could click on CPU to sort by CPU use, click second time to reverse the sort order.

Here are some possible fixes:

2018 01 04- 6 WAYS TO FIX WINDOWS 10 HIGH CPU USAGE AFTER CU OR FCU – 100% DISK 100% CPU

https://www.drivethelife.com/windows-10/windows...

READ MORE – 100% HIGH CPU / RAM / FAN

https://www.groovypost.com/howto/stop-whats-rev...

Top 10 Ways to Fix High CPU/RAM/Memory Usage after Windows 10 Update
https://www.drivethelife.com/windows-10/fix-hig...

Fix Windows 10 High Memory Usage/Leak after the Creators Update
https://www.drivethelife.com/windows-10/fix-hig...

Fix WMI Provider Host High CPU Usage after Windows 10 Creators Update
https://www.drivethelife.com/windows-10/wmi-pro...

Fix Computer Fan Noise Due to High CPU Usage on Windows 10
https://www.drivethelife.com/windows-10/fix-com...

PS: nice hardware, I'm jealous ... <g>

 

Hi Susie1. Welcome to the TenForums @Susie1

The next time you notice this happening can I ask you to check your event viewer for the system and see what kind of Errors you are getting. I think you can skip the Information items and likely even the warnings. Looking for the substantial things.


Ken

 

There is a utility called HwMonitor that is free to download. It will display the temperatures in your computer. Do a search for it and you will see it is located at cupid.com/hwmonitor.

It would interesting to see the temps before task manager is started and after task manager is started. It would be helpful if you could see if there is a program that stops when task manager is started. It is a very strange problem. In the past I've seen a virus that wouldn't allow the task manager to be started so a task couldn't be stopped but not one where the task stopped itself when task manager is started so it can't be detected.

 

I suspect you still have a little critter that actually forces the CPU to go high unless Task manager is opened

 

It sounds like a virus I had once. Evey time the task manager was opened, CPU usage dropped like a rock and a bunch of processes would disappear. I never figured out what the processes were, but it was fixed by an offline virus scan.

Download this: Rescue Disk for Windows | Comodo offers Free Rescue Disk Software

Burn that image to a CD/DVD and boot the computer from it. It will perform a offline scan of your computer where the OS drive isnt active. This can make it more likely to detect things that are there and remove them for thouroughly.

 

ArazelEternal Is probably correct. Many viruses and rootkits attempt to stop thier processes when taskmanager is opened. When closed they run, increasing CPU load and with it often temps and fan speed.

I would try tdsskiller and MBAR (not MBAM) first and see what happens. In a pinch you can also do an ofline of Windows Defender/Sec Essentials or the emsisoft emergency kit. Before doing any of that, backup important files to another drive or device. You may wind up having to reset the PC.

 

There was also two other members that had high disk usage and high CPU and it was a simple error caused by Shadow copy. In one, once we deleted the older data sets everything went back to normal. Hence the request to review the Event log. Could very well be a bug as suggested so not disagreeing with the scans.

Ken

 

Thank you all for pitching in.

After debugging my laptop with quite many anti-malwares, anti-spywares and a few anti-viruses, I downloaded a software to observe the CPU temperature. It turned out that the sudden drop in CPU usage right after opening the task manager is only because of the momentary spike in CPU usage for opening the task manager, no other reason.

As for the sound of the fan, after debugging my computer, now its sound remains consistent even after opening the task manager. Even at CPU usage around 10%, it continues to stay loud, at least by my definition of "loud". For this reason, now I'm trying ​​to find a fanless model to buy.