How to use update from an existing Xbox on one that has an E101 error?

Hello There @Veгified✔RR ! Basically the Error E101 occurs when you try to update your Xbox One console software, This why i advise you to check the link bellow to resolve it :

Error E101 occurs when you try to update your Xbox One console software | Xbox Support

Hey there AnxiousJarl7956.

Let's get you started on the right path for these particular errors. We have troubleshooters for both E101 and E102, first start out with this

E101 Troubleshooter and keep us in the loop with how it goes.

According to official E101 description:
"Error E101 occurs when you try to update your Xbox One console software You get one of the following error codes when you try to update your console software: E101 E101 xxxxxxxx xxxxxxxx Note The “x” digits vary. This means there was a problem with the update."

https://support.xbox.com/help/errors/error-code....

Hey Gian thanks for taking the time to bring this issue to us!

From the information provided it seems this is a start up error (Error e102). We suggest trying an offline system update since the original issue is that there is an update error. The fix for this particular issue we suggest following our I
need help with system updates on my Xbox One troubleshooter. Give it a shot and let us know how it goes!

Hi AproposSnail908,

If you're receiving E101 and you want to try to fix it then I would suggest using this link, which directs you to a system update solution. That said, if this console
is brand new, I would take it back to the retailer you purchased it from and get an exchange.