> For the complete documentation index, see [llms.txt](https://helpcenter.xopero.com/xopero-one-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://helpcenter.xopero.com/xopero-one-en/common-issues/workstations-and-servers/disk-image-backup-task-ends-with-an-error.md).

# Disk image backup task ends with an error

## Issue

> Disk image backup task did not complete successfully (ended with an error).

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## Resolution

Ensure that the **.NET Framework** installed on your system is version **4.6.1 or higher**. You can download it from [the **Microsoft** website](https://dotnet.microsoft.com/en-us).

If the backup still fails after installing the correct **.NET** version, access to **VSS** services may be blocked by another process. In this case:

1. In [**XMS**](#user-content-fn-1)[^1], open the **backup plan editing** window.
2. In **Advanced settings**, toggle the **Continue backup after VSS error** option **ON** and save the changes. This should resolve the issue.

<figure><img src="/files/nvF8xZ1J15GNgWFAWNv1" alt=""><figcaption></figcaption></figure>

[^1]: Xopero ONE Management Service