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csm boot

About this tag
The tag 'csm boot' refers to Compatibility Support Module boot, a BIOS/UEFI setting that enables legacy boot compatibility on modern Windows PCs. In the WindowsForum.com community, users discuss changing boot mode to CSM boot as a troubleshooting step when a system fails to boot or does not recognize a drive. This setting is often adjusted alongside secure boot to resolve boot issues, particularly when installing or recovering older Windows versions like 8.1. Topics include recovery USB creation, drive recognition problems, and data loss after boot mode changes. The tag covers practical advice for enabling CSM boot in firmware settings to address boot failures and recovery scenarios.
  1. molloy74

    Windows 8 Recovery USB messed up and installed 8.1 and I have lost everything

    I had 8.1 on my laptop but suddenly wouldn't boot "not recognised", online forum said change the "secure boot" and change the boot mode to "CSM boot" would fix it. This didn't work so download a recovery disk as I couldn't even boot my separate recovery drive on the laptop. I created a bootable...
    • molloy74
    • Thread
    • boot issues csm boot data loss drive lock file recovery recovery repair mode secure boot usb windows 8.1
    • Replies: 7
    • Forum: Windows Help and Support
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