Windows 10: Can’t boot into Windows after disabling CSM

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Disabling the Compatibility Support Module (CSM) in your BIOS is a common step when switching your system to pure UEFI mode, as it helps with faster boot times, secure boot features, and compatibility with modern OS updates. However, in many cases, when you disable CSM, you encounter issues, such as being unable to boot into […]

This article Can’t boot into Windows after disabling CSM first appeared on TheWindowsClub.com.

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Why cant I cant disable csm even though I have gpt on?

Thanks for reaching out! I'm an Independent Advisor and a Microsoft user like you.

Please try these steps:

1. Check BIOS Version and Update if Necessary: A BIOS update can sometimes resolve issues with settings not being saved or applied correctly. Check your motherboard manufacturer's website for any BIOS updates that might address this issue.
   
2. Ensure GPT Partition Style: Since Secure Boot usually requires the disk to be in GPT format and the system to boot in UEFI mode, ensure your disk is indeed using GPT. You mentioned having a GPT disk, but it's worth double-checking. Tools like Disk Management in Windows or the diskpart utility can confirm this.
   
3. Disable CSM Correctly: Depending on your motherboard, the process to disable CSM might vary. Ensure you're following the correct steps for your specific motherboard model. Sometimes, other settings in the BIOS need to be adjusted before CSM can be disabled.
   

Please do let me know if the method I suggested works for you or if you need further assistance.

 

booting Once from USB is OK and enough... so NOT NEEDED to Change the boot order, just boot from USB, Once

In the article you mentioned, step 4 suggests disabling "Fast Boot".



Was the CSM already disabled?

 

Cannot disable CSM to enable Secure Boot

Winver. 22H2 19045.3208 Hi there, I am having difficulty in enabling Secure Boot even when it is supported with my motherboard on the ASUS website. I was made aware of this by using the PC Health app:

After a bit of research, CSM being enabled in the BIOS can be a reason why Secure Boot is showing up as Unsupported on my msinfo32 report:

However, I cannot disable CSM on my pc as it does not boot Windows 10 after the change, meaning that either something in my pc does not have a UEFI driver or that it is due to my primary disk being MBR and not GPT (according to research). Any help with potential fixes or suggestions is much appreciated, thank you