The common issue is switching from one to another option, as some users are unable to boot with the Legacy boot. There are multiple reasons for that and we provided some solutions below.
What to do if Legacy Boot won’t work
Solution 1 – Disable Raid On and Secure Boot
If you’re unable to boot with the Legacy boot and, for some reason, need to avoid UEFI, our first suggestion is to disable both RAID and Secure boot in boot settings. Once you’ve done that, reboot your PC and try booting again. Of course, make sure that Legacy boot is enabled in boot settings. If you’re not sure how to access BIOS settings on Windows 10, follow these steps:
Solution 2 – Repair or rebuild bootloader
Issues with booting with the Legacy BIOS might lie in the bootloader corruption. Instead of MBR, which runs with UEFI, we’ll need you to repair GPT. For this, you’re going to need the Windows 10 installation media created with Media Creation Tool. After you’ve successfully made a bootable drive, follow the steps we listed below:
Solution 3 – Convert HDD to GPT
Finally, if you’ve previously used UEFI boot firmware to install a system on your HDD, you won’t be able to boot into a legacy mode. This drive is probably using MBR which won’t boot as it requires GPT. This can be resolved but, sadly, it requires formatting your drive in order to convert it to GPT partition. Here’s what you need to do: With that said, we can conclude this article. In case you have any questions or suggestions, feel free to tell us in the comments section below.
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