Multiple issues: Error code: 0x80070426

That's alright thank god for people like you!

How would you suggest I isolate the issue?

I want to know if it is an issue with my Keyboard, or my mouse or the fact that there is an Unknown Device in my Device Manager with a Yellow Flag.

After playing around with some things I'm starting to suspect that it may not be a hardware issue but an issue with the unknown device in my device manager.

I wouldn't know where to start when it comes to fixing that I've tried searching stuff up about it with no success.

Thankfully the guidance in this post - Windows Defender error 0x80070426 on restart - Microsoft Community - did the trick for me. Looks like it was the McAfee trial (never used and immediately uninstalled) that came with my Dell laptop that was causing the issue!

An old thread however, this information maybe useful for someone suffering from the 0x80070426 Windows update error.

I was able to get this problem corrected by going into "services.msc" and setting "Microsoft Account Sign-in Assistant Service" to Automatic startup type, and then starting the actual service. If I disable this, I was able to replicate the error above.