u/Lazy-Firefighter3

My laptop suddenly showing 'Secure boot violation invalid signature detected' error out of the blue, At the BIOS>Security>Secure Boot Everything is greyed out, Can't Even Disable the Secure boot option
https://ibb.co.com/r2qn6MyQ

https://preview.redd.it/dkf2ivrka21h1.jpg?width=2160&format=pjpg&auto=webp&s=0d920043f50283bb38f188f7f54b2e0bfefd508e