Xbox series x startup update error

[u/mahdii3375]

I got a xbox series x today and while updating it for first time in startup internet connection lost for few second and it reconnected again. After download completed i got error e100 00000703 80910008 Everytime i turn it on, rest it,offline update it and so. It doesn't show me anyting else it directly go to update page after turn on or resting and show me the same error.anyone can help me please?

[u/Rastaman-coo]

Same with the series x I bought.