Temporarily set a supervisor password in the BIOS. Set it to abc123 (easy to remember), don't want to brick the laptop by forgetting. Set Secure Boot to Disabled. Set supervisor password back to a blank password.

#MyHardware #NotWindows

https://techoverflow.net/2019/05/23/how-to-disable-secure-boot-on-insydeh20-uefi-bios-acer-aspire-a515-52-51el/