Windows 10: PC not booting after enabling Secure Boot – screen only shows color cycling

Hi everyone,I have a serious issue with my CSL all-in-one PC running Windows 11.I went into the UEFI firmware settings via advanced startup options to enable Secure Boot. After restarting, the system no longer boots.Here’s what happens when I turn it on:The screen just shows color cycles red, green, blue, white, etc.I can’t get into the BIOS/UEFI — pressing Del, F2, ESC, etc. does nothingI already removed and reinserted the CMOS battery — no changeI tried using a wired keyboard Logitech K200 but still can’t get a responseIt seems like the system is stuck before even reaching POST, possibly

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enable secure boot

Hi ShowMeGirl1

To enable Secure Boot, your PC must have UEFI BIOS and you need to boot your PC into BIOS

Start your PC, on the manufacturers logo screen, there is generally an indication of how to boot your PC into Setup - usually it is F2, or F12 . .

On the Manufacturers Screen, repeatedly press that appropriate key, so your system boots into BIOS

If you do have UEFI, you will see the Secure Boot and legacy Boot options, turn off Legacy Boot (if applicable) and turn on Secure Boot

Also Please Note: to enable Secure Boot, your hard drive must be GPT, not MBR!

 

Enabling Secure Boot Results in Black Screen

Yesterday I updated my Windows 10 to Windows 11 and I tried to play Valorant but Valorant was not opening because of an error saying "Enable Secure Boot"

I enabled secure boot but after Enabling Secure Boot my PC showed a black screen on startup.

I didn't know what to do, so please help me resolve this issue and tell me how to enable Secure Boot and not get a black screen problem again to play Valorant.

Moderator note < made some changes for better clarity >

 

Windows 8 Secure Boot Feature: Not So Secure?

So Linux is switching to secure boot also? Or they have to because of UEFI?