Updated BIOS which instructed me to clear TPM and now its unactivated & will not activate again, says this license has already reactivated windows before...?

It seems that after clearing the TPM (Trusted Platform Module) as instructed by the BIOS update, you are encountering issues with Windows activation. This could be due to the TPM being disabled or not properly initialized after the clearing process. Here are some steps you can take to troubleshoot the issue:

1. Re-enable TPM: Enter the UEFI/BIOS settings and ensure that the TPM is enabled. Save the changes and restart your computer.
2. Clear TPM Keys: If the TPM is still not functioning correctly, you may need to clear the existing TPM keys. You can follow the instructions in the article on how to clear all the keys from the TPM. Be cautious, as this can cause data loss.
3. Check Windows Activation: After ensuring that the TPM is enabled and cleared, check if Windows can be activated again. Sometimes, reactivating Windows may require you to enter your product key again.
4. Contact Microsoft Support: If the problem persists, consider reaching out to Microsoft support for assistance with your Windows activation issue, especially if it states that the license has already been used to reactivate Windows.

These steps should help you resolve the activation issue related to the TPM clearing process.

Hi, I understand how confusing this can be after a BIOS update.

Clearing the TPM changes the hardware signature that Windows uses for activation, so your digital license may no longer match the system profile, which is why it’s showing as unactivated and saying the license was already used.

The first thing to try is going to Settings then click Update & Security and then click Activation and running the Activation Troubleshooter, this often works if your license is linked to your Microsoft account.

Make sure you’re signed in with the same account that originally activated Windows and confirm the edition installed matches your license.

If the troubleshooter doesn’t fix it, you may need to contact Microsoft Support for a manual reactivation.

Can you confirm if your Windows license was linked to your Microsoft account before the BIOS update?

Regards,
Aron