One issue is that you have real-time protection turned off for Windows Defender.
Do you have a 3rd party AV program installed that you are using instead?
If not, then you should turn on real-time protection for Windows Defender.
Afterwards, click on Close for that error, click on the History tab, and see if you are able to clear (remove) your history.
Hope this helps for now,
A few things to check:
1. Double check in the right pane at the locations below in Group Policy (gpedit) to make sure that they are all set to "Not Configured".
Computer Configuration -> Administrative Templates -> Windows Components -> Windows Defender
2. Go to the locations below in regedit to see if you have a Windows Defender subkey under Microsoft. If you do, then delete the Windows Defender key, and restart the computer.
3. Make sure that the Windows Defender Service is set to Automatic and Started (running).
4. If the Windows Defender Service is missing, or you cannot change the settings for it, then download and merge the .reg file for the listed Windows Defender Service in the tutorial below. Afterwards, restart the computer. This will restore the default registry entries and settings for the Windows Defender Service.
Afterwards see if you are able to turn on real-time protection and clear your history.
Thanks - I had shut off Windows Defender from within the program, but it would nto come back up for me to turn it back on. I don't get why they did it like this.
I checked those policies, but they were "not configured - So I first Enabled "Windows Defender is Shut off" then I disabled it. After that, it popped right up, instead of giving me that worthless "Sorry, this has been shut down" shield with no information on it whatsoever.
I figured, when I shut it off, I could just turn it back on from within the Security Center area of Control Panel. But when I went to do that, there was nothing there. So, this allowed me to fix it.
What i did was to open gpedit.msc from run.. Went to Computer Configuration -> Administrative Templates -> Windows Components -> Windows Defender
From that i selected turn off windows defender.. Edited that from "not configured" to "enable".. and then to "disable".. and now its solved the error
Hello Leeelson, and welcome to Eight Forums.
Do you have a 3rd party AV program installed?
If so, then that would be why you are unable to turn on Windows Defender. Windows Defender is disabled by default when a 3rd party AV program is installed since it's not recommended to have more than 1 installed or enabled at the same time.