How to Fix Error 0x8050800c in Windows 11

Error 0x8050800c in Windows 11 typically appears when using Windows Backup or File History, often after a system update or when the backup storage location becomes inaccessible. This guide walks you through practical fixes, from checking permissions to resetting the backup service, so you can get your backups working again without losing data.

What You’ll Need

Administrator access to your Windows 11 PC
An external drive or network location where you plan to store backups
A stable internet connection if you’re using OneDrive or a network share

Step-by-Step

Run Windows Backup Troubleshooter
Go to Settings > System > Troubleshoot > Other troubleshooters. Find Windows Backup (or Backup) and click Run. Follow the prompts; this often resolves minor configuration issues.
Check Storage Permissions
Open File Explorer, right-click the drive or folder you’re backing up to, select Properties > Security. Ensure the SYSTEM account and your user account have Full control. If not, click Edit, add both accounts, and grant full permissions.
Verify the Backup Location is Accessible
If you’re using an external drive, make sure it’s connected and shows up in File Explorer. For a network share, confirm you can access it from this PC. Try copying a test file to the location to rule out hardware or network issues.
Disable and Re-enable File History
Open Control Panel > File History. Click Turn off, then wait a few seconds and click Turn on. This resets the File History service and often clears the error.
Restart the Backup Service
Press Win + R, type services.msc, and press Enter. Find Windows Backup (or File History Service). Right-click it, select Restart. If it’s not running, set its startup type to Automatic and start it.
Run SFC and DISM
Open Command Prompt as administrator (search “cmd”, right-click, “Run as administrator”). Run sfc /scannow and wait for it to finish. Then run DISM /Online /Cleanup-Image /RestoreHealth. Restart your PC afterward.
Delete and Recreate the Backup Set
If the above fails, go to Settings > Accounts > Windows backup (or Control Panel File History). Turn off backup, then delete the existing backup set from the target drive (if you have space). Re-enable backup and choose a fresh folder. This forces a clean backup configuration.
Check for Windows Updates
Go to Settings > Windows Update and click Check for updates. Install any pending updates, especially cumulative updates that often fix buggy backup components.

Common Mistakes

Using a drive that’s not NTFS – Windows Backup requires NTFS; FAT32 or exFAT drives may cause errors.
Ignoring permission prompts – When you change backup location, Windows asks for permission; skipping it can leave the wrong ACLs.
Not restarting after service changes – Some fixes only take effect after a full reboot.
Assuming the error is about the source drive – It’s often about the destination, so check both.

Tips

Use a dedicated external drive for backups, not a USB stick, as they are slower and less reliable.
If you use a network location, map it as a drive letter (e.g., Z:) to avoid path issues.
Keep your backup drive connected during the backup process; disconnecting mid-backup can corrupt the backup set.
Set a reminder to check backup status weekly – errors like this can go unnoticed for days.

Troubleshooting

If the error persists after all steps, try these additional checks:

Check Event Viewer – Open Event Viewer (Win + R, type eventvwr). Look under Windows Logs > Application for errors with source “Windows Backup” or “FileHistory”. The details may point to a specific file or permission.
Test with a different drive – Temporarily set backup to a different external drive. If it works, the original drive may have bad sectors or a failing file system. Run chkdsk /f on that drive (from an elevated Command Prompt).
Create a new local admin account – Sometimes user profile corruption causes this. Create a new admin account, try backup from there. If it works, migrate your files.
Reset Windows Backup components – In an elevated PowerShell, run Get-AppxPackage *WindowsBackup* | Remove-AppxPackage then reinstall via Settings > Apps > Optional features. This is a last resort but can clear stubborn corruption.

Frequently Asked Questions

What does error 0x8050800c mean?

It generally indicates that Windows Backup or File History cannot access the backup destination or that the backup service is misconfigured. It’s not a data loss error; your existing files are safe.

Will I lose my existing backups if I delete the backup set?

Yes, deleting the backup set removes the backup files on that drive. If you have space, try the other fixes first. If you must delete, consider copying the backup folder to another drive before doing so.

Can I use OneDrive as a backup location?

Yes, Windows 11 supports OneDrive for File History, but the error can occur if OneDrive is paused or not signed in. Ensure OneDrive is running and synced before attempting backup.

Why does the error appear only after a Windows update?

Updates can change service settings or introduce permission changes. Running the troubleshooter and restarting the backup service usually resolves it.

Is this error related to a virus?

No, it’s a system-level backup issue. However, if you suspect malware, run a full scan with Windows Security to rule it out.

How long should I wait after running SFC and DISM?

These commands can take 10-30 minutes. Let them finish completely; don’t close the window early. After they complete, restart and try backup again.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

More in this bed

The whole Tech How-To bed →