CSM keeps enabling after cold start

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   I have a Steel Legend B450 motherboard.  I tried to disable CSM and enable secure boot.  It works fine and I can boot into Windows 11.  However, whenever I shutdown the computer and restart 20 minutes later, CSM will enabled automagically and secure is disabled because of that.  If I reboot the computer without cutting off the power, the CSM and secure boot setting will remain the same.  I don't think there is any issue with the bios battery as all the other settings in the bios did not reset to default.

I have tried to update the bios to 4.6 and 10.08, that didn't fix the issue.  I have checked that my GPU card supports UEFI.  I have swapped the keyboard and mouse.  I have tried unplugging the network card and headset.  So I don't think there is any legacy device that might have caused the CSM to re-enable by itself.  

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andrewc Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: Yesterday Status: Offline Points: 20	Post Options Post Reply Quote andrewc Report Post Thanks(0) Quote Reply Topic: CSM keeps enabling after cold start Posted: Yesterday at 9:41am
	I have a Steel Legend B450 motherboard. I tried to disable CSM and enable secure boot. It works fine and I can boot into Windows 11. However, whenever I shutdown the computer and restart 20 minutes later, CSM will enabled automagically and secure is disabled because of that. If I reboot the computer without cutting off the power, the CSM and secure boot setting will remain the same. I don't think there is any issue with the bios battery as all the other settings in the bios did not reset to default. I have tried to update the bios to 4.6 and 10.08, that didn't fix the issue. I have checked that my GPU card supports UEFI. I have swapped the keyboard and mouse. I have tried unplugging the network card and headset. So I don't think there is any legacy device that might have caused the CSM to re-enable by itself.