Windows 10: please help with this tamper protection issue

For some odd reason, Tamper Protection on Windows Defender turned itself off. It'd be nice if I could just click and re-enable it, but somehow, this is disabled with the message "This setting is managed by your administrator,"........whats going on and please tell me how to turn it on?

:)

 

Microsoft Defender Antivirus - Tamper Protection

We use Windows 11 with Microsoft Defender Antivirus and tamper protection enabled. During a penetest we found out, that Microsoft Defender Antivirus can be easily disabled by installing a third Party antivirus solution, even tamper protection is enabled. Of course, local admin rights were required, but we were very surprised, that tamper protection can be so easily levered out.

We think this is a serious security issue and opened allready two cases by MS, but never got any response.

Has somenone an idea or suggestion, how to solve this issue with tamper protection?

 

Defender Tamper Protection/1903

Moderators: This thread deals with Defender Tamper Protection setting and 1903. If this would be better served in a different location, please feel free to move the post.

Just wondering if anyone who installed 1903 is having any unusual issue with Defender's Tamper Protection.
Here's the blow-by-blow.....

1. Friend and I were running 1809 and installed 1903 via Update Assistant on Tuesday, May 21st. No issues and Defender Tamper Protection was on (default setting).
2. Two days later, the 23rd, friend gets alert that Tamper Protection is off. She turned it on and it seems to be holding.
3. Today, I get the alert Tamper Protection is off and I turned it on. So far, it's holding.

I have no idea why Tamper Protection would turn off. Both computers are clean -- no viruses, trojans, malware or adware. We do not mess around in the registry and there is absolutely no third-party antivirus on either machine.

For now, I'm taking a wait-and-see if Tamper Protection turns off again. I don't know if it's a 1903 bug or not. Any ideas or suggestions would be appreciated.

 

Cant turn off tamper protection

Hi Faza,

I'm Christine, a Windows user like you. I'll do my best to help you.

I can see here that you cannot turn off the tamper protection. Please follow the steps below:

1. Please click start menu and type Access Work or School and hit enter. Check if there's an account connected, please try to disconnect it and check if you will be able to turn off the tamper protection.

2. Please check this link and follow the steps given by Kapil Arya and Dave Patrick.

https://learn.microsoft.com/en-us/answers/quest...

Please let me know the result. I'll be happy to assist you all the way until it's resolved.

Thank you,

Christine L

Independent Advisor