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How to permanently dismiss Windows Security PUA notification?

Super User Asked by Booga Roo on December 13, 2021

The Windows 10 May 2020 update included a new feature to block potentially unwanted applications(PUA). Thanks to this, I now have an annoying yellow warning sign ⚠️ in my task bar which I would like to get rid of.

You can see the option to dismiss the notification under "App & browser Control" when you click the icon. Clicking on "App & browser Control" takes you to a screen where you can dismiss the warning under "Reputation-based protection." Clicking on "Reputation-based protection settings" brings up yet another option to dismiss it next to "Potentially unwanted app blocking."

Unfortunately all of these are temporary. The warning comes back every couple of days or after every reboot.

I did find this Microsoft Docs article that had instructions to disable PUA using Group Policy. When I go to Group Policy Management Editor> Computer configuration> Administrative templates> Windows components> Microsoft Defender Antivirus> Configure protection for potentially unwanted applications and set that to "Enabled" with the options drop down set to "Disable (Default)" it does successfully clear the warning.

This results in a slightly unexpected "Disabled" appearance in the Group Policy editor. It also adds red text stating "This setting is managed by your administrator" over the "Potentially unwanted app blocking" section of the "Reputation-based protection" page.

I also tried the PowerShell commands in the article, but those settings basically just toggled the switch on and off. I do not have Intune or Endpoint Configuration Manager available.

What I would really like to know is: Is there a way the warnings can be dismissed permanently without going through Group Policy and without turning PUA on?

P.S. This is also not about disabling Windows Defender itself, only the notification for PUA protection being turned off.

2 Answers

I was able to figure this out today after pulling what's left of my hair out.

Setting this key gets rid of the notification: HKEY_CURRENT_USERSOFTWAREMicrosoftWindows Security HealthState

AppAndBrowser_PuaSmartScreenOff = 1 {DWORD}

Answered by KeppsLock on December 13, 2021

I am afraid the only solution to get rid of the warning is to enable the feature you don't want to have.

As stated in this thread, you can send a message to Microsoft:

use the Feedback Hub or whatever it's called to comment on features which are missing etc...

I have the Windows 10 version 20H2 and build 19042.746 right now and the problem still persists. But it seems this issue is not going away too soon.

Another person proposes the following solution, which is kind of acceptable:

why not provide an option to prompt me whenever Windows Defenders wants to submit something it considers suspicious? I'm certainly willing to let it do that, but I don't like the idea of the system automatically sending random files and making assumptions on whether or not they contain sensitive data.

PS: Ah, I just realised you are talking about "Potentially unwanted app blocking." and not about "Cloud Based" and "Automatic Sample Submission". Personally I have that feature disabled and Windows do not prompt me again, it just prompt the other two I have commented earlier.

Answered by ChesuCR on December 13, 2021

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