geekdom

If Secure Boot settings were erased, reboot into your computer after viewing Secure Boot Mode in the BIOS and update the certificates.

I rebooted my computer, used Advanced Startup to enter the BIOS, and viewed Secure Boot Mode.

After you log into the BIOS, you can access Secure Boot (enable or disable Secure Boot under Boot) and modify Secure Boot settings...

Acer machines have a password that must be first set and then entered to obtain access to Secure Boot. Here are specifics...