Then you can reboot to the UEFI menu and erase all the secure boot keys. First you need to run KeyTool.efi to save all keys. So taking ownership of this system has to be done carefully. There is no real option to place the system into setup mode by removing the platform key, there's only the option to 'Erase All Secure Boot settings' which erases every secure boot key including the platform key. The 'Security' menu has four secure boot settings, one of which is read only (The Secure Boot mode). The Secure Boot key management settings are in the Security menu and the Secure Boot enabled flag is in the Boot menu. To get into the UEFI startup menus, press F2 on power on or reboot. The Acer Aspire is a secure boot system based on the Phoenix UEFI BIOS.
