Fix: Essentials Error 0x80070426 in Windows 10

Boot into safe mode, and then try.

Recently started getting “Error Code: 0x80070426” on a new laptop that came with Windows 10 and Defender. There was and is no Microsoft Essentials to uninstall. Cannot go back to a previous system restore point as Windows “Anniversary” Update has disabled System Restore and removed all restore points. Defender seems to be working fine. How do I get rid of this error every time I boot up Windows? Thanks.

Hi Mr. Kevin. Thank you very much. I was trying to fix this problem since last few days. Now its working.

Can you open services.msc, disable and stop the windows defender service from there and then try?