Windows 10: 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 as no one else (that I can tell) has reported similar activity. Any ideas or suggestions would be appreciated.

:)

 

New Tamper protection in Microsoft Defender ATP for Windows 10

Source: Tamper protection in Microsoft Defender ATP - Microsoft Tech Community - 389571



Tip How to Turn On or Off Tamper Protection for Windows Defender Antivirus in Windows 10

 

Windows defender real time protection cant be turned on.

Go to Security and Maintenance, look in 'Security' and see what program is listed under Virus Protection. Windows Defender will not be enabled and functioning properly if there is a program other than Windows Defender listed.

You tried all suggestions in my previous post and Windows Defender “real time protection”
still will not turn on?

Did you try everything suggested in Problems
starting Windows Defender in Windows 8/8.1/10 to include (but not limited to) running SFC, scanning for malware and running the software removal tools for any security software (AVG,
McAfee, Norton, whatever) that may have previously been on the computer followed by a reboot? List of
anti-malware product removal tools

 

I can't turn on Windows Defender Real Time Protection

We appreciate your response. We suggest that you try to turn on Windows Defender Real Time Protection from a Hidden Administrator account. To enable Hidden Administrator, the following are the steps:

• Right-click on the Start button and select Command Prompt (Admin).
• In the command prompt, type in net user administrator /active:yes and press Enter.
• Log out and log back in using the Administrator account.

Let us know if you require further assistance.