can't delete windows defender exceptions

Raphael Huber 1 Reputation point
2021-03-18T15:41:24.21+00:00

hi all my defender has some trojans registred as exceptions for the scan. so if one of these trojans get on my system, it won't be handled by windos defender... i tried many ways to delet these entries, but after i leave and get back to the exceptions-list, they all are back in the list again. what can i do? is there a way to reset the windows defender completely?

Windows 10
Windows 10
A Microsoft operating system that runs on personal computers and tablets.
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  1. S.Sengupta 15,111 Reputation points MVP
    2021-03-19T02:08:16.657+00:00

    Click on the Start button and give a right-click on the Command Prompt.
    Click the Run as administrator option from the displayed list.
    Type the command ‘netsh advfirewall reset’ and press the Enter key.
    Now, the firewall settings will get reset to its default settings.

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    Press the Windows + R shortcut keys to open the Run panel.
    Type ‘wf.msc’ in the text box to open the Windows Defender Firewall with Advanced Security.
    Give a right-click on the Windows Defender Firewall tab that is located on the left-side panel.
    Select the Restore Default Policy option

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  2. Sunny Qi 10,896 Reputation points Microsoft Vendor
    2021-03-19T10:12:47.373+00:00

    Hi,

    Thanks for posting in Q&A platform.

    Please try the following methods to reset Windows Defender Firewall.

    1: Restore or Reset Default Windows Defender Firewall Settings in Windows Security

    Click Start and insert windows security to open Windows Security.

    Click on Firewall & network protection.

    Scroll down, find, and click on Restore firewalls to default.

    79578-image-1.jpg

    2: Restore or Reset Default Windows Defender Firewall Settings in Control Panel

    Open Control Panel.

    Click on Windows Defender Firewall.

    Click on Restore defaults.

    Click on Restore defaults a second time.

    Click Yes to confirm.

    79500-image-2.jpg

    3: Restore or Reset Default Windows Defender Firewall Settings in Powershell or Command Prompt

    Open PowerShell or the Command Prompt, and type in the following line and press Enter.

    The Command Prompt should return OK, while PowerShell will return nothing, as shown in the screenshots below.

    Command Prompt - netsh advfirewall reset

    79605-image-3.jpg

    PowerShell - (New-Object -ComObject HNetCfg.FwPolicy2).RestoreLocalFirewallDefaults()

    79606-image-4.jpg

    Here is an article for your reference:

    How to Reset Windows Defender Windows 10
    Please Note: Since the websites are not hosted by Microsoft, the links may change without notice. Microsoft does not guarantee the accuracy of this information.

    Best Regards,
    Sunny

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