Backup error VSS on server 2012 r2

N

Nikos2019

Hello everyone



I have a windows server 2012 R2 and when my scheduled backup runs I get this errors in the VSS:


"The backup operation that started at '‎2019‎-‎07‎-‎26T06:48:25.833600400Z' has failed with following error code '0x80780102' (The system writer is not found in the backup.). Please review the event details for a solution, and then rerun the backup operation once the issue is resolved."

And the following


Volume Shadow Copy Service error: Unexpected error querying for the IVssWriterCallback interface. hr = 0x80070005, Access is denied.
. This is often caused by incorrect security settings in either the writer or requestor process.


Operation:
Gathering Writer Data


Context:
Writer Class Id: {e8132975-6f93-4464-a53e-1050253ae220}
Writer Name: System Writer
Writer Instance ID: {b98b5e95-3fe7-408c-a7d4-8bbe7f8af030}



And this vss error:


Volume Shadow Copy Service error: Unexpected error querying for the IVssWriterCallback interface. hr = 0x80070005, Access is denied.
. This is often caused by incorrect security settings in either the writer or requestor process.


Operation:
Gathering Writer Data


Context:
Writer Class Id: {be9ac81e-3619-421f-920f-4c6fea9e93ad}
Writer Name: Dhcp Jet Writer
Writer Instance ID: {1665bfe1-29ca-4f19-bff2-e757c31c77dd}



I run the following command vssadmin list writers and all the writers look stable.


Also at the registry at [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\VSS\VssAccessControl] I don't have the NT Authority\\NetworkService instead I have the NT Authority\\LocalService and the dword is 1.


Also another problem that I encounter is that the VSS service stops unexpectedly during the day. I don't believe this is an error, I believe I gets to idle state.


Doew anyone knows how to resolve this problem.


Thank you

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