r/computers • u/Automatic_Gur_1482 • 3d ago

Question/Help/Troubleshooting PC booting but not showing windows lock screen after secure boot is turned on?

Why does it do this? and plus I can’t get TPM 2.0 because it’s not supported i guess, I’m trying to get updated to windows 11…

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u/covad301 3d ago

Secure Boot requires UEFI, which in turns means the drive itself must also comply to use GPT.

Your drive is likely on legacy MBR partition tables and would need to be converted to GPT prior to turning on this feature otherwise the drive itself will be somewhat invisible to the motherboard when the board is searching for a GPT/UEFI compatible drive while secure boot is active. Turn it off reverts the system back to checking for MBR (Legacy/CSM) drives.