Mt65xx Preloader !!exclusive!! -

Choose > Advanced options > Startup Settings > Restart . Press 7 or F7 to disable driver signature enforcement. Manual Installation :

In devices with secure boot enabled, the Preloader verifies the digital signature of the next stage bootloader (usually U-Boot or Little Kernel). If the signature does not match the keys stored in the Boot ROM, the boot process halts. This is a security measure to prevent malicious software from hijacking the boot process. mt65xx preloader