Legacy to UEFI Dual Boot System

[howard fidel]

I had W10 32 bit and W 11 64 bit installed on my PC with Legacy boot. The latest W11 update would not install without my converting the bios to UEFI. I did this, and the update installed properly. However, I lost the dual boot function. I've tried everything I can find online to fix the problem. If I returned the bios to Legacy boot, the PC reports no operating system. I put in my W10 USB installation drive and could boot in Legacy mode, but the repair function said the disk could not be repaired. I then went back to UEFI boot and made a UEFI W10 drive using RUFUS. My PC does not boot from th

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