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Windows Server Backup of Win 11 Client Unsuccessful Client VSS Problem (Access Permissions?)

Anonymous
2025-01-09T20:40:45+00:00

I have a WHS 2011 that backs up three PCs on my home network. The newest is a Windows 11 PC and the back up fails. The other two Windows 10 PCs continue to back up properly.

The following is form the Event Viewer for the Windows Server on the PC in question. Are there things I can do to configure or correct the issue causing the failed backup? The underlying issue seems to be a access permissions issue on the Win 11 PC.

Log Name: WSSG

Source: Windows Server

Date: 1/9/2025 1:41:11 AM

Event ID: 514

Task Category: Backup

Level: Error

Keywords: Classic

User: N/A

Computer: Bumblebee

Description:

Backup job 5 on STARFLEET did not succeed. Reason: ClientVssProblem, System.String[]

Event Xml:

514

0

2

2

0

0x80000000000000

9

WSSG

Bumblebee

5

STARFLEET

ClientVssProblem, System.String[]

From the event view application log

Log Name: Application

Source: VSS

Date: 1/9/2025 1:41:11 AM

Event ID: 8194

Task Category: None

Level: Error

Keywords: Classic

User: N/A

Computer: Bumblebee

Description:

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: {bb4c404c-389c-4302-979a-31bc05d1125e}

Event Xml:

8194

0

2

0

0

0x80000000000000

6028

Application

Bumblebee

0x80070005, Access is denied.

Operation:

Gathering Writer Data

Context:

Writer Class Id: {e8132975-6f93-4464-a53e-1050253ae220}

Writer Name: System Writer

Writer Instance ID: {bb4c404c-389c-4302-979a-31bc05d1125e}

2D20436F64653A20575254575254494330303030313238372D2043616C6C3A20575254575254494330303030313234312D205049443A202030303030343234382D205449443A202030303030303535322D20434D443A2020433A5C57494E444F57535C73797374656D33325C737663686F73742E657865202D6B204E6574776F726B53657276696365202D70202020202D20557365723A204E616D653A204E5420415554484F524954595C4E4554574F524B20534552564943452C205349443A532D312D352D3230

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  1. Anonymous
    2025-01-13T07:17:00+00:00

    Based on the error messages you provided, it seems that there is an access permissions issue on the Windows 11 PC that is preventing the backup from succeeding. You can try the following steps to resolve the issue:

    1. Check the permissions on the folders that are being backed up. Make sure that the user account used for the backup has the necessary permissions to access those folders.
    2. Check the VSS service on the Windows 11 PC. Make sure that it is running and set to automatic startup.
    3. Check the antivirus software on the Windows 11 PC. Make sure that it is not blocking the backup process. You can try temporarily disable the antivirus to see if the issue persists.
    4. Open Command Prompt as an Administrator and run the following command to check VSS writers.

    vssadmin list writers

    If any writers are in an error state, you can restart the associated service.

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  2. Anonymous
    2025-01-13T20:52:41+00:00

    Thank you for the reply. I’ve checked steps 2-4 and found them to be working and in order. All the VSS writers are stable with no error.

    Can you provide insights to validate step 1? I’m not sure what account does backups on WHS 2011. I’m just using the standard backup options from the WHS Dashboard.

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