These errors may occur in the following situations:
- When you try to download and install updates.
- When you try to purchase apps from Microsoft Store
- When you upgrade Windows 10 from lower version to higher version.
Mostly, when you upgrade Windows 10 from the lower version to a higher version, the Windows Security Essential gets replaced by the Windows Defender. If something went wrong then both items get resides in the PC. In such cases when you try to launch Windows Defender, it will unable to start and shows the Error code 0x80070426.
There are several ways to fix this problem so, some of the effective solutions are listed below. I am sure by applying these methods, you will be able to remove this error effectively.
Method 1: Fix using Advanced System Repair Tool.
Most of the time, this error occurs due to missing dependable system files like dll files, exe files, sys files, ocx files, inf files, etc. Apart from this if the system is suffering from software conflict you may get the same error. In order to properly fix this error, we recommend you to use Advanced System Repair Tool. This tool is one of the best PC Optimizer tool that fixes all kinds of errors in PC and keeps your PC Updated, secure, error-free and blazing fast.
Method 2: Uninstall Microsoft Security Essential Manually
If you have upgraded your Windows 10 and after that, you are getting the same error then the best way to fix this error is by removing Windows Security Essential Manually.
Step 1: Stop Windows Defender Service First. Open Task Manager by pressing CTRL + SHIFT + ESCAPE simultaneously. Go to Service Tab and find WinDefend and stop it.
Step 2: Go to Control Panel > Programs & Features > Uninstall a Program and Uninstall Windows Security Essential and Reboot your PC. After the Reboot, Windows Defender gets start automatically and you will not get any 0x80070426 error code.
Method 3: Restore System Health using DISM Command Line Tool
DISM stands for Deployment Image Servicing and Management (DISM.exe). It is a command-line tool that basically scans PC health and restore lost or broken system files.
Step 1: Open Command Prompt as Administrator.
Step 2: Type or paste the following command and press Enter.
dism.exe /online /cleanup-image /restorehealth
Step 3: Wait for the completion of the process. It will usually take couple of minutes.
Step 4: Now type
sfc /scannow in command prompt and press Enter. It is a System File Checker tool that usually finds and replaces missing system files.
Step 5: Now, restart your PC and most probably you won’t get the same error again.
Method 4: Run Windows Update Troubleshooter
If you are getting error code 0x80070426 when installing updates in Windows 10, then Windows Update Troubleshooter may help you a lot.
Step 1: Go to Start Menu and Type Troubleshoot in the Search box.
Step 3: The Troubleshooter will start working and search for the problem. Finish the troubleshooting and after that, you will not get any update related issues.
Method 5: Reset Windows Updates
In order to fix update error 0x80070426 permanently, you need to reset Windows Update Components. When you will reset this component, it will start downloading and installing a fresh copy of updates files.
Step 1: Open Command Prompt as Administrator
Step 2: Type these commands one by one and press Enter to execute.
net stop bits
net stop wuauserv
net stop appidsvc
net stop cryptsvc
ren %systemroot%\softwaredistribution softwaredistribution.old
ren %systemroot%\system32\catroot2 catroot2.old
net start bits
net start wuauserv
net start appidsvc
net start cryptsvc
Step 3: Now try to download and install updates again. Most probably you will not face any update related issues.
Method 6: Update all the installed drivers and software.
After upgrading Windows 10, it is necessary to update all the installed software and drivers. Most of the time an older version of software or drivers creates problems with a higher version of the operating system but as soon as you install updates, these software become compatible with Windows 10.
In this article, I have tried to explain how can you fix Windows 10 Error Code 0x80070426 easily. I have explained 6 effective methods to fix this error however if you know some other trick to resolve this problem then you must give your solution in the comment box.