If you've disabled telemetry or reduced the amount of data sent, it will override the ability to receive insider builds.
You can run this command below from elevated command prompt. Spoiler reg flags HKLM\Software\Microsoft\WindowsSelfHost\Applicability set DONT_VIRTUALIZE
This is why I only customize the user interface. Disabling, or adjusting the telemetry drastically effects the user experience that I prefer to have with Windows 10. I need this OS to communicate as it should, and not be hobbled. There is no telling what you will be missing when you adjust how Windows communicates with the cloud as it should.
No, I never changed the telemetry setting, everything was fine a day before. Today I got the notification "update has been installed", I checked then I found this.
Are you using the Enterprise version? During setup, did you say that this computer was owned by you or by your employers?