Almost 2 weeks ago our backups stopped working totally. It would just stand still and eventually fail. Today i was informed that this might be a windows defender bug with DPM. And i can confirm it is. Working with MS Support on a permanent fix for this issue.
I initially thought it was a Database bug. But it’s defender.
If one open up Performance Monitor it will hang for a long time. Like this
How to disable Windows Defender the Right Way
So i tried to disable defender by going in to Windows Settings | Windows Defender and turn off it there. But that did not work. What i had to do was go in to local group policy editor and go to
Computer Configuration | Administrative Template | Windows Components | Windows Defender
And then Turn off Windows Defender.
Now you will se your backups working again.