E100 update error, now xbox one won't boot

Have a look at this page, it should resolve your issue

Error E100 occurs when you try to update your Xbox One console

Pulled from
https://support.xbox.com/en-US/xbox-one/errors/error-code-e100

1. Go to the Xbox One System Update Solution.
2. SelectI am getting an error message or an error code.
3. SelectI am getting an error code.
4. Scroll down the screen and selectE100 XXXXXXXX XXXXXXXX.
5. Follow the instructions in Step 4 to successfully update your console.

Hi Jonathan,

Thanks for your post. I understand you are experiencing an issue with an Xbox One original console throwing an E100 error when attempting to startup the console. To troubleshoot this, check out this article:

Error E100 - Xbox One.

I hope this helps.

OK, this is the second time in two or three months that the system update causes the e100 error. The first two steps of the update are ok. When it reaches the third step it crashes and troubleshoot apppears with the e100 error. This is becoming annoying.
Fix your updates. My console is not the only one with this issues due to a recent system update.

Hello

To resolve the E100 Error please follow the following steps

1. Go to the
   Xbox One System Update Solution.
2. Select I am getting an error message or an error code.
3. Select I am getting an error code.
4. Scroll down the screen and select E100 XXXXXXXX XXXXXXXX.
5. Follow the instructions in Step 4 to successfully update your console.