I have a Dell Latitude E5421 laptop with Windows 10 Pro O/S.    I updated the O/S  some years ago, changed the boot from Legacy to UEFI and installed 8 GB of RAM. Secure Boot is Unsupported.  Can someone kindly tell me if/how I can change to Secure Boot Supported. Thanks Hello, Unfortunately, if your Dell Latitude E5421 laptop does not support secure Boot, there is no way to change it to support Secure Boot. Secure Boot is a hardware-based feature, and if the laptop's BIOS or UEFI firmware does not include the necessary components to enable secure boot, it cannot be added or enabled through software changes.  I hope the information may helps you.  Thanks with regards,  Terryduff
I have a Dell Latitude E5421 laptop with Windows 10 Pro O/S.    I updated the O/S  some years ago, changed the boot from Legacy to UEFI and installed 8 GB of RAM. Secure Boot is Unsupported.  Can someone kindly tell me if/how I can change to Secure Boot Supported. Thanks
Secure Boot