How do I disable CSM in my BIOS for windows 10

Question

How do I disable CSM in my BIOS for windows 10

When trying to disable CSM in my windows 10 BIOS it keeps telling me I need to enable UEFI on my Video Policy but it is set to UEFI Only for all options and still tells me its set to Legacy. How do I fix this?

Carl-L 22,905 Reputation points Microsoft External Staff Moderator

2025-10-03T08:43:54.6533333+00:00
Hi 🆃︎🅾︎🅰︎🆂︎🆃︎ ,

Thanks for contacting Microsoft Q&A forum. I'm happy to help you today.

I understand that you are trying to disable CSM boot on your computer. Before we proceed, I'd like to ask a few questions to better clarify your issue.

The BIOS settings varied between manufacturers and sometime even devices. So I'd like to know your computer model to see how I can help.

If possible, could you please send me a photo of the BIOS environment and the part that having issue? Please remember to remove any personal details if applicable.

Just for clarification, the BIOS is from the manufacturer, which cannot be changed directly from the OS (Windows 10 in this case). So can you please clarify what do you mean by (Windows 10 BIOS)?

I'm waiting for your answers so we can work in this together.
Carl-L 22,905 Reputation points Microsoft External Staff Moderator

2025-10-06T09:05:08.17+00:00

Hi 🆃︎🅾︎🅰︎🆂︎🆃︎ 

Just checking in to make sure that you received my reply. Please let us know if you still need assistance.
Carl-L 22,905 Reputation points Microsoft External Staff Moderator

2025-10-07T08:20:41.8533333+00:00

Hi 🆃︎🅾︎🅰︎🆂︎🆃︎ 

It's been a while since we last heard from you. May I know if you have any updates in this?

Any feedback is appreciated.

Your answer

Carl-L 22,905 Reputation points Microsoft External Staff Moderator

2025-10-03T08:43:54.6533333+00:00

Hi 🆃︎🅾︎🅰︎🆂︎🆃︎ ,

Thanks for contacting Microsoft Q&A forum. I'm happy to help you today.

I understand that you are trying to disable CSM boot on your computer. Before we proceed, I'd like to ask a few questions to better clarify your issue.

The BIOS settings varied between manufacturers and sometime even devices. So I'd like to know your computer model to see how I can help.

If possible, could you please send me a photo of the BIOS environment and the part that having issue? Please remember to remove any personal details if applicable.

Just for clarification, the BIOS is from the manufacturer, which cannot be changed directly from the OS (Windows 10 in this case). So can you please clarify what do you mean by (Windows 10 BIOS)?

I'm waiting for your answers so we can work in this together.
Carl-L 22,905 Reputation points Microsoft External Staff Moderator

2025-10-06T09:05:08.17+00:00

Hi 🆃︎🅾︎🅰︎🆂︎🆃︎ 

Just checking in to make sure that you received my reply. Please let us know if you still need assistance.
Carl-L 22,905 Reputation points Microsoft External Staff Moderator

2025-10-07T08:20:41.8533333+00:00

Hi 🆃︎🅾︎🅰︎🆂︎🆃︎ 

It's been a while since we last heard from you. May I know if you have any updates in this?

Any feedback is appreciated.