I installed fedora today, and it would boot to the kernel initially, but after I installed a security update both the 7.0 kernel and the one before wont boot completely. It’s stuck on a blank screen and a blinking cursor. I’m running a 12th gen i5 and an rtx 3060
It seems you have possibly installed a custom kernel that was not signed by fedora. Secure boot would prevent booting that custom kernel.
Try disabling secure boot in the bios settings and see if there is a difference, or boot from the stock fedora kernel.
As far as I know secure boot was always disabled. On my motherboard’s bios (ASUS) it doesnt show specifically if its on or off. The options are OS type (which is set to Other OS instead of Windows UEFI) and Secure Boot Mode is set to Custom instead of Standard
You can tell if secure boot is enabled or disabled with the command mokutil --sb-state
It says it’s disabled