Before enabling Secure Boot, it's essential to verify whether your system uses Legacy BIOS (MBR) or UEFI mode, as enabling Secure Boot on a Legacy BIOS system could make your installation unbootable. Typically, UEFI mode is required for Secure Boot.
To check if you're using UEFI or Legacy BIOS: 1. Open the 'Run' dialog by pressing
Win + R
Win + R
. 2. Type
msinfo32
msinfo32
and press Enter. 3. In System Information, look for the "BIOS Mode" line: - It will say "UEFI" if you're already using UEFI. - It will say "Legacy" if you're not.