Fix 0x80070020

Another process is locking Windows Update files.

What it means

Another program (often antivirus, backup tools, or installers) is using a file Windows Update needs.

Try this first

  1. Restart your PC and try Windows Update again.
  2. Close background installers and pause antivirus scans temporarily.
  3. Try updating after a clean boot (optional).

Advanced steps

  1. Run Windows Update Troubleshooter.
  2. Repair system files: sfc /scannow
  3. Reset Windows Update components and retry.

Reset Update Components (Unlock Common File Locks)

If another process is locking update files, restarting services and resetting the update cache often clears 0x80070020.

Run these commands one at a time (Command Prompt as Admin):

net stop wuauserv
net stop bits
net stop cryptsvc
net stop msiserver

ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
ren C:\Windows\System32\catroot2 catroot2.old

net start wuauserv
net start bits
net start cryptsvc
net start msiserver

sfc /scannow

Restart your PC and try Windows Update again.

If the Error Still Persists

If background software keeps locking Windows Update files, manual steps may not fully resolve repeated failures.

An automated repair tool can scan for Windows issues and help stabilize updates.

Recommended option
Fix Windows Update issues automatically

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Frequently Asked Questions

What causes error 0x80070020?

This error usually occurs when a required Windows component, service, or system file is not working correctly. It may be caused by corrupted system files, disabled services, failed updates, or software conflicts.

Is error 0x80070020 dangerous?

The error itself is not dangerous, but it can prevent Windows features, updates, or applications from working properly. If ignored, it may lead to stability or security issues over time.

Can error 0x80070020 be fixed without reinstalling Windows?

Yes. In most cases, this error can be resolved using troubleshooting steps such as repairing system files, enabling required services, or using automated repair tools, without needing to reinstall Windows.