The 0x80070426 error code is a Windows update error that occurs when the computer is unable to connect to the Windows update server. This can happen for a number of reasons, including a firewall blocking the connection, the Windows update server being down, or the computer not being connected to the internet.
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1. Run the Windows Update Troubleshooter
- Open the Windows Update Troubleshooter by clicking on the Start button, typing Windows Update Troubleshooter in the search box, and pressing Enter.
- On the Troubleshooting Information tab, click on the Problem Details button.
- On the General Information tab, under Problem category, click on the Update Problem button.
- On the Update Problem Details tab, under Problem type, click on the Check for updates button.
- On the Available updates list, click on the Check for updates button.
- On the Update Status tab, under Available updates, click on the OK button.
- If the updates are found, under Status, click on the Install updates button.
- If the updates are not found, under Status, click on the Restart now button.
- After the computer restarts, under Status, click on the OK button.
- In the updated information, under Status, click on the Close button.
2. Restart the Windows Update Service
- Open the Run prompt by pressing the Windows key and typing "run".
- Type "cmd" and press Enter.
- At the command prompt, type "net stop wuauserv" and press Enter.
- Type "net start wuauserv" and press Enter.
- If you are prompted to enter a user name and password, type the administrator user name and password.
- Verify that the Windows Update Service is started by entering "net status" at the command prompt and looking for "WU_SERVICE_STATUS" to return a value of "started."
3. Reset the Catroot2 folder
- Open the command prompt and type the following: net stop catroot2
- Type the following command to restart the catroot2 service: net start catroot2
- Type the following command to verify that the catroot2 service has been restarted: net status
- If the catroot2 service is not running, type the following command to start it: net start catroot2
4. Install the latest updates from Microsoft
- Open Windows Update and sign in.
- On the left-hand side, under “Updates,” click “Check for updates.”
- If there are new updates available, they will be listed on the right-hand side.
- Click “Install updates.”
- If you are prompted to select the updates, click “Yes.”
- After the updates are installed, Windows will restart.
- If you have any questions or problems, please contact Microsoft support.
5. Run a System File Checker scan
- Open a command prompt.
- Type system file checker and press Enter.
- The system file checker will start to scan your computer for missing, corrupted, or out-of-date system files.
- It will notify you if it finds any problems.
- You can Fix any problems that the system file checker finds by following the instructions it provides.
6. Run a malware scan with your antivirus program
- Open your antivirus program and click on the "Scan" button.
- In the "Scan Type" drop-down menu, select "Threat Scan."
- In the "Scan Settings" window, select the items you want to scan, such as files, folders, and drives.
- Click on the "Start Scan" button.
- When the scan is complete, click on the " finished " button to view the results.
- If you find any malware, click on the "Fix" button to remove it.
Some users might also have success with the following opitons:
- Temporarily disable your antivirus software
- Perform a clean boot of your computer
- Contact Microsoft Support