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    Home»Windows 11»Fix – Windows 11 PC Won’t Boot after Disabling CSM
    Windows 11

    Fix – Windows 11 PC Won’t Boot after Disabling CSM

    By Viney DhimanMarch 15, 2022Updated:March 15, 2022No Comments3 Mins Read
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    One of the minimum requirement to install Windows 11 is to enable secure boot which won’t be possible without disabling Compatibility Support Module (CMS).

    According to reports from various users, as soon as they disable CMS their PC show no boot drives and doesn’t boot or boot into BIOS.

    If you made upto this blog post then we presume that you also facing the same issue, right? To help you out we decided to cover this blog post in which you will find out why its happening and how to fix it.

    So why this happening? On Intel motherboards, CSM (Compatibility Support Module) should only be disabled if your GPU is UEFI compatible. If not, you’ll run into the issue you’re reporting. If you had CSM enabled on your UEFI bios it’s entirely possible that you have a MBR disk and not a GPT disk

    Contents show
    Fix – Disabling CSM Windows 11 PC Won’t Boot
    Converting Partition Style
    Changing Boot Mode To UEFI

    Fix – Disabling CSM Windows 11 PC Won’t Boot

    So if you’re facing this issue, then its highly possible that partition style is MBR. To fix this issue, you need to covert partition style from MBR to GPT and then change boot mode to UEFI

    Converting Partition Style

    First of all, you need to check the partition style on your PC. For that, press the Windows + X key combo, and then from the menu select Disk Management. 

    Disk Management

    Now right click on the Disk (Windows installation drive c:) and then click on Properties. 

    Disk 1

    In the Properties window, head to the Volume tab, and then see the Partition Style. 

    Volumes

    If the partition style is GPT, then you can skip this part, and move to the second. However, if the partition style here shows MBR, then you will have to convert it to GPT first. To do so, follow the steps given below-

    Press the Windows key on your keyboard and search for CMD. Now select Command Prompt and then click on Run as Administrator. 

    CMD

     In the Command Prompt, type the command DISKPART and hit Enter. 

    Diskpart

    Next, in the Command Prompt, type in the command list disk and hit Enter to execute it.

    List Disk

    Now, type the command select disk 1 and hit Enter. Do note, that we have taken 1 as the reference here. You will have to replace 1 with the disk number that you want to convert from MBR to GPT.

    Select Disk

    Next, execute the command convert gpt in the Command Prompt to convert the partition style from MBR to GPT.

    Convert GPT

    Once the partition style has been converted, you can confirm it using the Disk Management application by following the steps mentioned above.

    Changing Boot Mode To UEFI

    Now continuing to the second part, you will have to convert changing boot mode to UEFI. You can do so by following the steps given below-

    Restart your PC and boot into BIOS menu. Generally, the key to access the BIOS menu is F1, F2, F10, F12, or DEL. If you are unsure about the BIOS key for your PC then you can search for it on the internet.

    After heading to the BIOS menu, head to the Boot tab.

    Boot list option

    Here, select UEFI/BIOS boot mode option and hit Enter to change it. From the list select UEFI and hit enter to change the boot mode to UEFI.

    Save changes and restart bios

    Once done, press F10 to save the changes and exit the BIOS.

    By doing so, you will be able to fix the issue you are facing, and your PC will boot normally.

    Please do not hesitate to Contact me on Twitter if you want assistance with issue related to Windows 11, Windows 10, and Edge browser. I will try my best to assist you ASAP. (Follow me first and then PM your issue on Twitter)

    Buy us a coffee if you find information shared in this blog post useful. Mention ‘Coffee’ in Subject. So that I can thank you

    Disable CSM Windows 11 PC Won't boot
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    Viney Dhiman
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    Himachali, Mechanical Engineer, Snooker Lover, Avid drinker of Scotch, Traveler, and Webmaster.

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