If your Chromebook shows the error The security module on this device is not working, the usual fix is a hard reset. Press and hold the Refresh key and tap the Power button. This restarts the hardware, including the security chip, and clears the error in most cases.
Applies to
- Chromebooks running ChromeOS
- A hard reset uses the Refresh and Power keys
- No developer mode or command line needed
What is the security module?
The security module is the security chip (TPM) in your Chromebook. It stores the encryption keys that protect your account and data. When ChromeOS cannot talk to this chip, you see the message that the security module is not working. A hard reset restarts the hardware and usually restores the connection.
Before you start: A hard reset can delete files saved in your Downloads folder on some Chromebooks, so back up anything important first. A hard reset is not the same as a Powerwash. A Powerwash erases the whole device, so do not start with that.
How do I fix the security module error on a Chromebook?
- Turn off the Chromebook completely. Do not just close the lid.
- Press and hold the Refresh key, then tap the Power button.
- When the Chromebook starts up, release the Refresh key.
- Sign in and check whether the error is gone.
Alternative: repeated power cycle
Some users report that fully powering the Chromebook off and on several times also clears the error. This is a gentler option if you would rather not do a hard reset.
- Power on the Chromebook and leave it on for at least 30 seconds without doing anything.
- Power off the Chromebook completely.
- Repeat a few times. Several readers needed to do this many times before the error cleared.
What if the error keeps coming back?
- Make sure ChromeOS is fully updated, then restart.
- If it still returns, back up your files and Powerwash the Chromebook as a last software step.
- If the message continues after a Powerwash, it may be a hardware fault with the security chip. Contact your Chromebook maker for service.
Frequently asked questions
Will a hard reset delete my files?
A hard reset restarts the hardware. On some Chromebooks it can remove files in the Downloads folder, so back them up first. Anything saved to Google Drive or your account stays safe.
Is a hard reset the same as a Powerwash?
No. A hard reset only restarts the hardware. A Powerwash erases the entire Chromebook and returns it to factory settings. Try the hard reset first.
What does the security module actually do?
It is the TPM security chip that stores encryption keys for your Chromebook. It protects your sign-in and data, which is why ChromeOS blocks access when it cannot reach the chip.
Conclusion
In most cases a simple hard reset clears the security module error. If it comes back, update ChromeOS and Powerwash as a last resort, and contact your manufacturer if the problem is hardware. Let us know in the comments which step worked for you.
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