Chromebook keeps signing out or returning to the login screen: unexpected sign-outs can be a crash, storage pressure, managed-session policy, account token problem or power interruption. Determine whether the whole device restarts. Check the uptime and any crash notifications in ChromeOS.
Differential
Likely causes of “Chromebook keeps signing out or returning to the login screen”, and how to tell them apart
- 1
A crash or a restart of the session
What separates it The Chromebook returns to the sign-in screen and the uptime is short, suggesting the device restarted or crashed.
How to confirm Check the uptime and any crash notifications in ChromeOS.
- 2
Storage is nearly full
What separates it Sign-out happens when storage is low, and the device has little free space for the profile.
How to confirm Check free storage in Settings and clear Downloads if it is nearly full.
- 3
An extension or a policy is ending the session
What separates it The sign-out happens on a school or work Chromebook, or after installing an extension.
How to confirm Test in Guest mode and see whether the sign-outs continue.
- 4
An account token or a sign-in problem
What separates it Guest mode is stable and only the normal profile signs out, and the account was recently changed.
How to confirm Check the account status and, if needed, sign in again after backing up Downloads.
Before you touch a setting
Record this first — changing settings destroys the evidence
- Uptime and any crash notifications, and whether the whole device restarts.
- Free storage, whether the Chromebook is managed by a school or employer, and recent extensions.
- Whether Guest mode signs out too.
Try in this order
0 of 4 completedCapture the exact symptom
ReversibleCheck uptime, crash notifications, free storage and whether the Chromebook is school/work managed.
Run the smallest isolation test
ReversibleTest Guest mode and another network; update ChromeOS and remove only the extension proven to crash the session.
Correct only the proven cause
ReversibleResolve the account or administrator policy if Guest stays stable; back up Downloads before Powerwash.
Verify before changing anything else
ReversibleUse the normal profile through sleep and wake without a sign-out.
Stop boundary
When this stops being a self-service repair
- !Back up Downloads before removing the account or running a powerwash, since both erase local files.
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why does my Chromebook keep signing me out?+
The device may be restarting, storage may be full, or a policy or extension may be ending the session. Guest mode tells you whether it is the account or the device.
What should I try first?+
Restart, check for updates, and make sure there is free storage. Then sign in again.
Is Powerwash safe?+
Powerwash resets the device and removes local data, so back up first. Most files sync to the account, but downloads may not.