VSS error 0x800423F4 happens when creating a system image on Windows 11/10.
If you are plagued by this annoying issue, follow the fixes collected byMiniToolto root out it.
Besides, professional Windows backup software like MiniTool ShadowMaker is introduced.

However, you may fail to back up your system.
On the computer screen, you receive an error popup, sayingthe backup failed.
A Volume Shadow Copy Service operation failed … (0x807800A1).

When viewing additional information, you seethe writer experienced a non-transient error … (0x800423F4).
To fix this issue, you could move to the next part.
Step 1: Inputservicesinto the search box and nudge the app to open it.
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Step 2: Double-click onVolume Shadow Copyto open thePropertieswindow.
Step 3: Set theStartup typetoAutomatic.
If this service is stopped, clickStartto run it.

you could go to disable it to see if the issue is fixed.
Step 1: Go to open Control Panel by finding it in the search box.
And view all the items by large icons.

Step 2: Tap onWindows Defender Firewall > Turn Windows Defender Firewall on or off.
Step 3: ChooseTurn off Windows Defender FirewallunderPrivate online grid settingsandPublic online grid configs.
Then, go toVirus & threat protection > Manage settingsand disableReal-time protection.
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If you are running third-party antivirus software, also disable it.
Step 1: Launch Command Prompt with admin rights.
Step 2: Entersfc /scannowand pressEnter.
Step 2: UnderTools, clickCheck.
Step 3: Hit onScan drive.
These are the common fixes to solve Volume Shadow Copy error 0x800423F4.
Here, we recommend using MiniTool ShadowMaker.
Also, it supports scheduled backups, incremental backups, and differential backups.
Besides, you’ve got the option to delete old backups to free up space with ease.
Now, get it via the following button for a trial.
Directly tap onDESTINATIONand select an external drive to save the system image.
Step 3: At last, tap onBack Up Now.
Want to create automatic file backups in Windows 10/11?
This post shows you how to automatically back up files to an external hard drive with ease.
Try the given solutions to address it.
If they cannot help, try the backup software MiniTool ShadowMaker for PC backup.