Windows Defender is the built-in pc protection application for all version’s of the Windows OS starting with Windows 7. If, for whatever reason, Windows Defender is disabled on your computer and isn’t actively protecting it, all you need to do in order to enable Windows Defender and get it to start protecting your pc again is to launch Windows Defender and click on Start now in the Home tab. But, unfortunately, many Windows 10 customer have recently started reporting that when they do so, Windows Defender doesn’t start and they instead see an error message containing error code 0x80070422. the complete error message reads:
This problem can be caused via anything from a corrupted Windows Defender registry key or the Windows Defender service being disabled to a 3rd-party computer security program clashing with Windows Defender or corrupted Windows elements. Thankfully, though, there are just as many possible solutions to this problem as there are causes, and the following are some of the most effective ones: how to fix windows defender error code 0x80070422.