So, using the downloadable script to just run and install/onboard a client. But, when it starts it gives error:

[Error Id: 15, Error Level: 1] Unable to start Microsoft Defender for Endpoint Service. Error message: The service name is invalid.
For more information, visit: https://go.microsoft.com/fwlink/p/?linkid=822807

Windows 11 Pro latest monthly updates. Nothing more to this install, it is fresh/new. There is no service by the name. No idea how this can be fixed, searched high/low and nothing. Seemingly, some reg entry changes it’s ability of the built-in one? Event viewer says same error.

All computers are not joined to any domains locally. Computer is Entra registered in Cloud. Not sure how this Windows Defender service even gets installed. Apparently there is no downloadable manual file installed/uninstaller etc?

Any help appreciated.

​So, using the downloadable script to just run and install/onboard a client. But, when it starts it gives error: [Error Id: 15, Error Level: 1] Unable to start Microsoft Defender for Endpoint Service. Error message: The service name is invalid.For more information, visit: https://go.microsoft.com/fwlink/p/?linkid=822807 Windows 11 Pro latest monthly updates. Nothing more to this install, it is fresh/new. There is no service by the name. No idea how this can be fixed, searched high/low and nothing. Seemingly, some reg entry changes it’s ability of the built-in one? Event viewer says same error. All computers are not joined to any domains locally. Computer is Entra registered in Cloud. Not sure how this Windows Defender service even gets installed. Apparently there is no downloadable manual file installed/uninstaller etc? Any help appreciated.  Read More

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