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Xbox One · Error code

E101

An Xbox One startup error after a failed system update — usually fixed with an offline update from USB.

Multiple causes Last reviewed June 13, 2026

Explanation

What this error means

E101 is a startup error in the same family as E100 and E102: a system update didn’t apply correctly and the console can’t boot normally. Microsoft’s guidance is to repair it with the Offline System Update, which reinstalls the system files from a USB drive rather than over the network.

Official reference: Microsoft support page for E101

Diagnosis

Most likely causes

Cause How likely Fixable at home?
System update failed to install Very likely Yes — offline update
Update interrupted by power loss Likely Yes — offline update
Corrupted system files Possible Sometimes — reset, keep games
Storage hardware fault Rare No — Xbox Support

Repair

How to fix it

Ordered easiest-first. Try the next step only if the error comes back.

  1. Power-cycle first

    Hold the console’s Xbox button 10 seconds to power off, then restart. A stalled update sometimes recovers on a clean boot.

  2. Apply the Offline System Update

    Download the OSU file to a FAT32 USB drive ($SystemUpdate folder), enter the Startup Troubleshooter, and select “Offline system update”.

  3. Try “Restart this Xbox”

    In the troubleshooter, the non-destructive restart option occasionally lets the interrupted update complete.

  4. Reset but keep games & apps

    If the update won’t take, use “Reset this Xbox > Keep games & apps” to reinstall the OS while preserving installed games.

    ⚠ Avoid “Remove everything” unless you mean to wipe the console — it deletes local saves that aren’t synced to the cloud.

Escalation

When it's not your fault

Signs the problem is on Microsoft's side — or in the hardware — rather than anything you can change:

  • It appeared immediately after a system update or a power interruption.
  • Other users report the same startup code following the same update.
  • The console worked fine until the update attempt.
When to contact Microsoft: If both the offline update and a keep-games reset fail, contact Xbox Support — persistent E101 can indicate a drive problem. Check the official Xbox One server status page first, then reach Microsoft support if the error persists.

Questions

FAQ

How is E101 different from E100 or E102?

They’re closely related startup/update failures with the same repair path. The offline system update is the recommended fix for all of them.

Does the offline update delete anything?

No — it reinstalls system files only. Your games, apps, and cloud-synced saves are kept.

What if I can’t reach the troubleshooter?

Hold the Xbox button to power off, then press and hold Bind + Eject while pressing the Xbox button to boot into the Startup Troubleshooter.

E100 A startup/update error on Xbox One — the system update failed and the console can’t finish booting normally. E102 Xbox One won’t start or update because a system update failed — the offline update usually repairs it. E105 Xbox One fails to start with error E105 — a corrupted system update that typically needs an offline update or reset. E208 An update error on Xbox One — the console hit a problem while updating, but it usually still boots to the troubleshooter.