About Windows Defender Firewall.

Question

Hi,

I have some problems in Windows 10, so ask you how to fix them.

When running a specific program, "LocalServiceNoNetworkFirewall" service uses very high CPU and the program does not work correctly.

So I want to know in what situation this service works.

Thanks in advance,

Yongmin Kwon

Answer 1

Hi Yongmin,

I'm Paul, a fellow customer like you & a Windows 10 Independent Advisor. Kindly try below steps.

1. Go to Settings> Update and security> Windows Defender> Open Windows Defender Security Center> Firewall and Network Protection> Restore the default Firewall settings.
2. Open up Window Defender Security Center -> Virus & Thread Protection -> Virus & Thread Protection Settings -> Exclusions -> Add or remove exclusion -> Add Folder -> ""C:\ProgramData\Microsoft\Windows Defender"
3. Restart PC.

I hope this helps. Looking forward to your reply. Thank you!

Sincerely,

Paul A.

Microsoft Independent Advisor

Answer 2

Hi Yongmin,

Thanks for that Yongmin. No worries, it's my pleasure.

So to confirm, the "LocalServiceNoNetworkFirewall" service utilizes CPU only when using that program right? Meaning, if you close that program, the CPU utilization of "LocalServiceNoNetworkFirewall" normalizes right?

If that's the case, then let's try to exclude from Windows Defender your "NDIS version 6.20" & other apps used in creating that camera viewer program. Let's exclude there EXE & Application Folder by following the steps below & see if it fixes it.

Click Start > type the word "Security" > open "Windows Security" > click "Virus & threat protection" > click the link "Manage settings" > scroll down

• To exempt your app EXE, click "Manage Controlled folder access" > click "Add or remove exclusions" > "+ Add an exclusion" > choose "Folder" > find the application folder of "NDIS version 6.20 app" & other apps folder you're using to create your "camera viewer program"

• To exempt your app Folder, click "Manage Controlled folder access" > click "Allow an app through Controlled folder access" > click "+ Add an allowed app" > choose "Browse all apps" > find the .exe file of the "NDIS version 6.20 app" & other apps you're using to create your "camera viewer program"

By the way, will the same CPU peak issue also occur when either doing below?

• search using "Cortana"

• switch applications or hover over the Taskbar

Are you also using either "Chinese Simplified" & "Chinese Traditional" languages?

I hope this helps. Looking forward to your reply. Thank you!

Sincerely,

Paul A.

Microsoft Independent Advisor

Answer 3

Hi Paul,

Thanks for your reply.

To briefly write down what I did with Googleing,

1. System file recovery

2. Changed Firewall Rules

[Registry]

3. Turn off firewall 
4. Increasing packet transmission rate.
5. and much more...

I don't remember all of my works becasue I did so many things on Google,

but these are roughly the same.

Below is a screenshot you requested.

Version: 1809

OS Build: 17763.678

Please don't let the firewall work in certain program.

I appreciate your help. Thank you!!

Sincerely,

Yongmin.

Answer 4

Hi Yongmin,

Thanks for confirming. If I may ask, what registry changes did you make? Thanks.

Kindly send me a screenshot of the following below:

Settings > Systems > About > scroll down > take a screenshot of the "Version" & "Build"

Looking forward to your reply. Thank you!

Sincerely,

Paul A.

Microsoft Independent Advisor

Answer 5

Hi Yongmin,

I'm Paul, a fellow customer like you & a Windows 10 Independent Advisor. Kindly try below steps.

1. Go to Settings> Update and security> Windows Defender> Open Windows Defender Security Center> Firewall and Network Protection> Restore the default Firewall settings.
2. Open up Window Defender Security Center -> Virus & Thread Protection -> Virus & Thread Protection Settings -> Exclusions -> Add or remove exclusion -> Add Folder -> ""C:\ProgramData\Microsoft\Windows Defender"
3. Restart PC.

I hope this helps. Looking forward to your reply. Thank you!

Sincerely,

Paul A.

Microsoft Independent Advisor

Hi, Paul.

Thank you very much for your reply.

I followed your steps, but symptoms did not change at all.

In fact, I had a problem with the link below.

I was wondering the firewall operating conditions to solve the problem.

https://answers.microsoft.com/en-us/windows/forum/all/some-problems-with-base-filtering-engine-and/262f3199-c5a0-42b3-a7df-ebc9caada8b4

I've already reinstalled and changed registry values, but firewall is still works.

Can you give me some advice?

Sincerely,

Yongmin.