Windows 10: PC not booting after enabling Secure Boot – screen only shows color cycling

Discus and support PC not booting after enabling Secure Boot – screen only shows color cycling in Windows 10 Software and Apps to solve the problem; Hi everyone,I have a serious issue with my CSL all-in-one PC running Windows 11.I went into the UEFI firmware settings via advanced startup options to... Discussion in 'Windows 10 Software and Apps' started by Dina Osmanagic, May 14, 2025 at 1:27 PM.

  1. DINA OSMANAGIC
    Dina Osmanagic Win User

    PC not booting after enabling Secure Boot – screen only shows color cycling


    Hi everyone,I have a serious issue with my CSL all-in-one PC running Windows 11.I went into the UEFI firmware settings via advanced startup options to enable Secure Boot. After restarting, the system no longer boots.Here’s what happens when I turn it on:The screen just shows color cycles red, green, blue, white, etc.I can’t get into the BIOS/UEFI — pressing Del, F2, ESC, etc. does nothingI already removed and reinserted the CMOS battery — no changeI tried using a wired keyboard Logitech K200 but still can’t get a responseIt seems like the system is stuck before even reaching POST, possibly

    :)
     
    Dina Osmanagic, May 14, 2025 at 1:27 PM
    #1
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PC not booting after enabling Secure Boot – screen only shows color cycling

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