Fix Windows Update Error 0x80070003 – Windows 10, Windows 11 2026

Windows includes a built-in troubleshooter specifically designed to resolve update-related issues.

1. Press Windows + I to open Settings
2. Navigate to System → Troubleshoot → Other troubleshooters
3. Locate Windows Update and click Run
4. Allow the troubleshooter to scan and detect issues
5. Follow the on-screen prompts to apply recommended fixes
6. Restart your computer when prompted
7. Open Windows Update and attempt to install updates again

Verification: Navigate to Settings → Windows Update and click Check for updates. The error should no longer appear.

This method manually resets all Windows Update services and clears the update cache.

1. Press Windows + X and select Terminal (Admin)
2. Stop Windows Update services by running these commands:

net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver

3. Rename the SoftwareDistribution and catroot2 folders:

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

4. Restart the Windows Update services:

net start wuauserv
net start cryptSvc
net start bits
net start msiserver

5. Close Command Prompt and restart your computer
6. Open Windows Update and check for updates

Verification: Run Get-Service wuauserv,cryptsvc,bits,msiserver in PowerShell to confirm all services are running.

System file corruption often causes update failures. Use SFC and DISM to repair damaged files.

1. Open Command Prompt as Administrator
2. Run the System File Checker:

sfc /scannow

3. Wait for the scan to complete (this may take 15-30 minutes)
4. If SFC finds issues, run DISM to repair the Windows image:

DISM /Online /Cleanup-Image /RestoreHealth

5. After DISM completes, run SFC again to ensure all files are repaired:

sfc /scannow

6. Restart your computer
7. Attempt Windows Update installation

Verification: Check the SFC log at %windir%\Logs\CBS\CBS.log to confirm no integrity violations remain.

Manual cache clearing and registry cleanup can resolve persistent update issues.

1. Create a registry backup by running:

reg export HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate C:\backup_wu_registry.reg

2. Stop Windows Update services:

net stop wuauserv
net stop bits
net stop cryptsvc

3. Delete Windows Update cache folders:

rd /s /q C:\Windows\SoftwareDistribution
rd /s /q C:\Windows\System32\catroot2

4. Open Registry Editor (regedit) and navigate to:

5. Delete the AU subkey if present
6. Navigate to:

7. Delete the RebootRequired value if it exists
8. Restart Windows Update services:

net start wuauserv
net start bits
net start cryptsvc

9. Restart your computer and test Windows Update

Verification: Run Get-WindowsUpdateLog in PowerShell to generate a readable update log and check for errors.

If all previous methods fail, an in-place upgrade repairs Windows while preserving your files and applications.

1. Download the Windows 11 Installation Assistant or Media Creation Tool from Microsoft's official website
2. Run the installation tool and select Upgrade this PC now
3. Choose Keep personal files and apps when prompted
4. Follow the installation wizard to complete the upgrade
5. After the upgrade completes, check Windows Update functionality

Alternative method using ISO file:

1. Download the latest Windows ISO file
2. Mount the ISO by double-clicking it
3. Run setup.exe from the mounted drive
4. Select Download updates, drivers and optional features
5. Choose Keep personal files and apps
6. Complete the installation process

Verification: After the upgrade, run winver to confirm the new Windows version, then test Windows Update functionality.