Windows Defender Scheduled Scan does not work; message 0x2 is returned

Microsoft claims that one can schedule Defender to run a scan according to a specified schedule (e. g., everyday at 8 P. M.). See: https://support.microsoft.com/en-us/...nder-antivirus

Yet, even after having followed Microsoft Support's own instructions (see screencapture below), I have failed every time in getting it to run. All I keep getting is: 0x2 . . . which seems to mean that something interfered with the execution of the process.



Any thoughts on how to make this work?

I believe the intention is Defender will run when your PC is idle. If it starts to run and your PC is used, the scan will stop. And it will wait again until it is idle.

However in my case it has never run. I always get the 0x2 error. This is my post from 2016 > Defender not Running Regular Scan

As a workaround, I created a Manual task which works fine.