Windows 10: Windows Defender CPU Limit is not working properly

I have Windows server 2016, In which we are using windows defender. During full scan of windows defender CPU usage is 100%.

To limit CPU usage i have edited group policy and set cpu usage to 30 but still it is not working and cpu usage reached 100% during full scan.


Note: i also tried using power shell script and regedit.


Can anyone please help me how to reduce CPU usage while running full scan of windows defender

:)

 

Windows Defender - high CPU and disk usage

Thank you very much for your quick response. I've taken all steps you suggested. This is the outcome:

• Add a process exclusion
  
  Unfortunately, this didn't work. I added both a path and a process exclusion now.The task scheduler for
• Defender looks like this for me:
  
  
  
  

• It seems no Defender tasks have run since June 30th, yet the process continues to hog the CPU
• I re-ran SFC /scannow. SFC could not find any integrity violations
• I tried disabling behaviour monitoring. The setting did not persist across a reboot, and turning it off did not make a difference while my system was still running.
  
  
  This was the output for Powershell:
  
  

PS C:\Windows\system32> Set-MpPreference -DisableBehaviorMonitoring $True

PS C:\Windows\system32> Get-MpPreference | findstr "Behavior"

DisableBehaviorMonitoring : True

PS C:\Windows\system32>

• Scanning for viruses and leftover antivirus software. This was interesting (yet unfruitful):
  
  Neither Kaspersky nor Emisoft could find any threats. MalwareBytes did find 5 executables in my temp folder, although Virustotal.com reported no danger for the files. This could mean it's a false positive, but I removed all traces of them anyway.
  
  It also found two installers (PUPs) for a Spigot toolbar, I removed those as well. They probably came with some free software package, I try to prevent installing toolbars.
• In installed AVG Anti Virus (the free version). When I rebooted after the installation, Defender was still running and taking up 25-30% of my CPU. I disabled Defender using the Group Policy editor and the service finally stopped.

AVG works for me, but like most free anti virus programs it's full of ads and "free offers" and fishy SSL/TLS interception ("web protection").

I'd like to keep using Windows Defender because it's neatly integrated into Windows 10, doesn't take a lot of resources and doesn't show annoying ads.

I hope anyone can suggest another way to fix this weird Windows Defender problem.

 

How to limit the maximum CPU resources for a specific process?

I've googled and found this blog but when I try to repeat the steps, I see that my context menu doesn't have the options to limit a process. I restarted Task Manager as admin but it didn't make any difference.

How can I limit Windows Defender? It goes bananas on occasion. I want it to keep working but not make my computer fan act as a helicopter...

 

time limits in family not working

Hi Barbara,

We would like to know more details about your concern about the Family Safety time limit that is not working so we can better assist you. Kindly answer the following:

• Does it happen only with particular child account?
• What troubleshooting steps have you done so far?

In the meantime, we would suggest that you refer to this
support link on how to set up screen time limits for your child.

We look forward to your response.