Share via

Windows 11 backuo error and system image not working

Anonymous
2025-06-21T05:01:21+00:00

I still use the old Windows backup, without problem. backups successful to removable drive (G) Toshiba.

Today backup failed.

I also tried to create a system image, using 2 different ways.

These also failed.

Screen shots following.

Any help, please?

Windows for home | Windows 11 | Performance and system failures

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

Answer accepted by question author

Anonymous
2025-06-21T05:49:24+00:00

Hi there, thank you for sharing those screenshots. I’m Cherrelyn, an Independent Advisor, and I understand how frustrating it is when a long-working backup suddenly fails. From your logs and error messages (0x80780166, “Incorrect function,” and “The server threw an exception”), the issue seems related to the external drive (G:) or Windows Backup permissions. Here’s a concise, step-by-step guide to help you fix it:

Try These Fixes:

1.Reconnect the External Drive

-Safely remove the Toshiba drive, reconnect it, and check if it mounts properly in File Explorer.

-Right-click > Properties > Tools > Error Checking – fix any disk issues.

2.Run Backup as Administrator

-Open Control Panel > Backup and Restore (Windows 7)

-Click “Manage space”, then clean old backups.

-Then try running a new backup as admin.

3.Reformat Backup Drive (if possible)

-Back up its contents to another location first.

-Reformat as NTFS. Corruption or permission issues can cause error 517.

4.Enable VSS Services

-Press Win + R, type services.msc

-Ensure these are Running & Automatic:

-Volume Shadow Copy

-Microsoft Software Shadow Copy Provider

5.Create a New Backup Configuration

Instead of using the old schedule, click “Set up backup” again and configure a fresh backup to the same or new drive.

Let me know how it goes or if you’d like help with alternatives like File History or 3rd-party backup tools that might better fit your workflow.

Warmly,

Cherrelyn

Was this answer helpful?

1 person found this answer helpful.
0 comments

1 additional answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2025-06-21T22:11:23+00:00

    Thanks very much for your reply.

    I found another entry on the web, and this was practically the same advice you gave.

    What I did, was chkdsk on removable disk (G). No problems.

    I then used Windows b/up and recovery to delete all previous images, including the folder (b/up containing windows images).

    I created a new restore point on drive (G), and checked it went through without problem.

    Created a new system image on (G). This time no problem.

    Checked drive (G) back up details, and all ok.

    Ran Windows backup, and success. All ok.

    What a hassle, but at least problems now seem to be resolve.

    Thanks again for your response.

    Was this answer helpful?

    0 comments