Formatting disc and Secure Boot - new Win 10 installation.

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  1. sygnus21's Avatar
    Posts : 5,759
    Win 10 Pro (x64) 21H1 (19043.1023
       #41

    TheOwner said:
    i can boot from UEFI even with CSM!
    So can I (as can anyone else). CSM is a compatibility module that allows legacy devices to boot in UEFI. Nothing new here.

    TheOwner said:
    I think CSM is independend on secure boot,
    If you mean separate settings in the BIOS/UEFI, that's certainly true of my Gigabyte boards as shown in post #30. And yes, it is possible some boards may have a single setting - say a "Secure Boot" setting that automatically disables CSM when enabled.

    If you mean Secure Boot being enabled whether CSM is disabled or not, well in my experience as a system builder, and Microsoft saying the same, CSM must be disabled for Secure Boot... Windows 11 and Secure Boot...
    To change these settings, you will need to switch the PC boot mode from one enabled as “Legacy” BIOS (also known as “CSM” Mode) to UEFI/BIOS (Unified Extensible Firmware Interface). In some cases, there are options to enable both UEFI and Legacy/CSM. If so, you will need to choose for UEFI to be the first or only option.
    Last edited by sygnus21; 01 Dec 2021 at 12:50.
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  2. Posts : 32
    Windows 7 64bit SP1
    Thread Starter
       #42

    Ok thank you guys! I will disable CSM. I still not much understand how secure boot keys works, that Windows installer tells those keys to UEFI which signature it can accept? I hear something those keys are predefined by mobo manufacturer.
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  3. Posts : 32
    Windows 7 64bit SP1
    Thread Starter
       #43

    AddRAM said:
    Never take a chance, just unplug the Sata power cable from any other drives.
    If i disable SATA port with my HDD in UEFI, it is the same as unplugged HDD? I dont want mess inside my PC....
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  4. Berton's Avatar
    Posts : 12,292
    Win10 Version 21H2 Pro and Home, Win11 Pro
       #44

    You want to keep all the motherboard resources available to a Windows install so unplugging the data cable to the drive would be best. The OS/Operating System [all types] read the BIOS, both MBR and GPT, to determine what features are available and set up accordingly.
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  5. sygnus21's Avatar
    Posts : 5,759
    Win 10 Pro (x64) 21H1 (19043.1023
       #45

    If you disable any SATA ports in the BIOS any drives connected to them won't be seen. I do it all the time.

    I know some are going to argue what ifs and worst-case scenarios, but they won't be seen. This can be tested by disabling them and checking Windows
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  6. steve108's Avatar
    Posts : 19,673
    19041.1466 - 2004/20H1 Pro x64
       #46

    TheOwner said:
    If i disable SATA port with my HDD in UEFI, it is the same as unplugged HDD? I dont want mess inside my PC....
    That seems sufficient to me as the installer won't have access to the HDD.
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  7. NavyLCDR's Avatar
    Posts : 16,812
    Windows 11 Pro
       #47

    Berton said:
    You want to keep all the motherboard resources available to a Windows install so unplugging the data cable to the drive would be best. The OS/Operating System [all types] read the BIOS, both MBR and GPT, to determine what features are available and set up accordingly.
    I would disagree. There is no difference between disabling SATA ports in BIOS and removing data cables because the SATA controller is still going to be detected by Windows, only the drives will not be detected, the same as if the data cables were removed.
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  8. steve108's Avatar
    Posts : 19,673
    19041.1466 - 2004/20H1 Pro x64
       #48

    NavyLCDR said:
    I would disagree. There is no difference between disabling SATA ports in BIOS and removing data cables because the SATA controller is still going to be detected by Windows, only the drives will not be detected, the same as if the data cables were removed.
    Hi NavyLCDR ,
    Glad your ship came in as I wanted to ask you about this recommendation to disconnect extra drives.

    You posted recently that you don't do it IIRC. Under what circumstances would you disconnect additional drives yourself or recommend others do it?
    Thanks.
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  9. NavyLCDR's Avatar
    Posts : 16,812
    Windows 11 Pro
       #49

    steve108 said:
    Hi NavyLCDR ,
    Glad your ship came in as I wanted to ask you about this recommendation to disconnect extra drives.

    You posted recently that you don't do it IIRC. Under what circumstances would you disconnect additional drives yourself or recommend others do it?
    Thanks.
    None.
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  10. sygnus21's Avatar
    Posts : 5,759
    Win 10 Pro (x64) 21H1 (19043.1023
       #50

    There is NO reason to remove SATA cables when disabling the SATA ports in the BIOS achieves the same thing and is much quicker and simpler to do. It's only those without actual experience who would disagree
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