1. CSM enabling enables UEFI startup and non UEFI startup.
2. If you need to start the traditional MBR equipment, you need to start the CSM.
3. When CSM is turned off, it will become a pure UEFI startup, and it fully supports safe startup.
4. Secure Boot, which is only applicable to operating systems started with UEFI.
5. In the notebook BIOS, there are two more options: Enabled and Disabled.
6. When Windows 8 comes with the computer, Secure Boot is Enabled by default.
7. As a result, the CSM (Compatibility Support Module) is disabled by default, and the computer cannot start devices that do not fully support UEFI.
8. To enable the computer to start devices that do not fully support UEFI, you must turn off Secure Boot and then turn on CSM.
