Enabling Secure boot

[Symbolizm]

I need to enable secure boot. 

I enabled it in bios as well as updated the keys. I made sure to boot drive was in GPT. Pc would not boot. 

I reset cmos to get back into bios. The it told me in bios, “secure boot invalid signature detected.” 

Looking that up it told me to deny execute option rom. It will not boot and I cannot get bios to boot either.
 

I have tried removing drives and booting, and I still get nothing on screen. Usually when I have changed setting in bios and had booting issues. The light to by gpu wouldn’t turn on. Then after resting cmos I could get into the bios. Now the gpu like is on, but even after resetting cmos and rebooting numerous times, I get nothing. 

[Tetras]

What is the graphics card? Can you use integrated graphics?

 

What is the motherboard/CPU?

[whispous]

Unfortunately, you cannot simply enable the feature and then expect to boot an existing installation.

 

Under proper circumstances, you install Windows WHILE Secure boot is turned on.

 

This is still your best option - back up any data, and freshly reinstall Windows on a wiped drive.

 

[Symbolizm]

48 minutes ago, Tetras said:

What is the graphics card? Can you use integrated graphics?

 

What is the motherboard/CPU?

3090, Asrock b650e itx, 7500f. So unfortunately mb doesn’t have integrated graphics and doesn’t have bios flash. 
 

I tried using an old Radeon 7850 I had laying around. But still nothing. Just using any recourse I can, chat gpt, is saying it could not work with am5 chips. 
 

So the only option I’m finding is getting an spi programmer. And that seems really complicated for me to do at home. 
 

I kind of lost for options. 

[Levent]

9 hours ago, Symbolizm said:

I enabled it in bios as well as updated the keys.

 you updated secure boot bios keys how exactly?

7 hours ago, Symbolizm said:

old Radeon 7850

most likely another problem there, most HD 7XXX cards dont have UEFI GOP, I had to mod one into my HD7850.

 

"Secure boot invalid signature detected." means your secure boot key update didnt work or you have an unsigned bootloader (meaning your install not UEFI)