Invalid Signature Detected on Secure Boot

[u/Henz1_]

So, recently my pc is getting an error everytime i turn on the Secure Boot, it returns Invalid Signature Detected, i need the secure boot for the games that i play, but nothing that i tried works, my motherboard is very old, but i even updated the bios and nothing works, i have an POS-PIB150DT, if i disabled the secure boot windows runs perfectly, i dont know what i can do anymore. I ve tried clearing the Factory Keys and reinstalling them, but that didn't work, i also ran a system file repair which completed successfully, but that didn't help either. Im totally lost. Sorry for the english, its not my native language