这个情况要去官网下载32313133353236313431303231363533e4b893e5b19e31333365653235带开启CSM功能的bios升级文件。在产品支持里面有的。升级之后就可以进bios开启CSM了。升级bios有风险，自己注意。

DOS Flash Utility SOP

v1.2

1. Copy BIOS folder to USB storage.

2. Power on system.

3. When you see the LOGO or hear one short beep, please press “Delete” to

enter BIOS Setup Utility.

4. Choose “Authentication” page and select “Secure Boot” to disabled.

5. BIOS Setup Utility will disable “Secure Boot”

6. Choose “Boot Options” page and select “Boot Menu” to Enabled.

7. Choose “Exit” page and select “Save & Exit Setup” and press “Enter”.

8. Select “Yes” to restart.

9. When you see the LOGO or hear one short beep, please press “Delete” to

enter BIOS Setup Utility.

10. Choose “Boot Options” page and select “Launch CSM” to Always.

11. Choose “Exit” page and select “Save & Exit Setup” and press “Enter”.

12. Select “Yes” to restart.

13. Press hot key F12 to enter Boot Menu, and select USB thumbdrive.

14. Enter BIOS folder.

15. Enter “DOS” folder.

16. Execute “BIOS_DOS.bat” file.

17. Process to flash BIOS (don’t reset).

18. Press the power button to shut down the system.

19. Boot system and wait for finishing update BIOS.

20. When you see the LOGO or hear one short beep, please press “Delete”

to enter BIOS Setup Menu.

21. Select “Load Default Settings” and press “Enter”.

22. Select “Yes” to load default setting.

23. Select “Save & Exit Setup” and press “Enter”.

24. Select “Yes” to restart.

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