Remember that UEFI uses GPT partition type and CSM uses MBR. Disable Safe boot option from BIOS security settings.ģ.Find on your BIOS Settings about Boot Mode, change from UEFI(Unified Extensible Firmware Inferface) boot to CSM(Compability Support Mode)/Legacy BIOS mode boot. Just search on net how to go to your BIOS settings based on your brand.)Ģ. Usually by striking key upon loading the unit and before the OS logo appears on the screen. Load BIOS Settings page ((Head to BIOS Setting on your PC/Laptop which differs from different brands. See note below.ġ.Disable Safe boot and change Boot Mode to CSM/Legacy BIOS Mode.Ģ.Make a bootable USB Drive/CD that is acceptable/compatible to UEFI.ġst Option: Disable Safe boot and change Boot Mode to CSM/Legacy BIOS Mode.ġ. Do not just backup on the same disk with different partition because you might end up deleting all current partitions on the disk to install a fresh copy of Windows 7. Therefore even you make Bootable flashdrive or CD it won't show up on boot menu or booting process.īackup all your necessary data to an External Disk Drive/Flash Drive/ or another Unit.

UEFI has feature called safe boot which adds extra layer of security to loader and it prevent booting from external sources like bootable USB Drive or CD. I ran into the same problem when I changed from Windows 10 (due to it's current flaw -the increased internet usage through background apps and system updates) to windows 7.Īlthough it is marked solved, I still taken the time to add my comment hoping to help future readers of this thread. Therefore installing windows 7 and lower OS that is BIOS Based and uses MBR disk partition takes some proper configuration to be successful. Windows 8 and higher OS uses UEFI mode and has GPT Disk Partition type by default.

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