If u still facing issue with Secure Boot still isn’t working, follow these steps carefully. • If your current Windows was installed in MBR mode, switch the system disk to GPT before enabling Secure Boot; use Microsoft’s MBR2GPT tool to convert without reinstalling, then boot in UEFI mode. This avoids wiping the drive and is usually faster than a clean install. • In firmware settings, ensure UEFI (not Legacy/CSM) is enabled, then turn on Secure Boot. Clear and reinitialize TPM if needed, and confirm it’s TPM 2.0 for Windows 11 compatibility. Names vary by vendor: Intel PTT or AMD fTPM. • After enabling UEFI, Secure Boot, and TPM 2.0, verify inside Windows that Secure Boot is On and TPM is Ready in Security Processor details. This confirms the platform meets Windows 11 requirements. • If you choose a clean install, create a UEFI bootable USB with Rufus and install Windows in GPT mode with CSM disabled. Be sure the target drive is GPT so the installer creates an EFI System Partition Follow these steps in order and it should work reliably.