How can I restore a lost EFI partition on my Windows 11 SSD?

December 14, 2025 1 answer
Asked by TechyBob123
I have a 240GB M.2 SSD (not NVMe), and I installed Windows 11 on this drive while a 512GB SSD was connected via SATA. However, when I try to boot from the 240GB SSD without the 512GB SSD connected, I don't see any Windows Boot Manager in the BIOS or UEFI. It seems that during the installation, the EFI partition was created on the 512GB SSD. Is there a way to create a new EFI partition directly on the 240GB M.2 SSD so that I can boot into Windows 11 without needing to connect the 512GB SSD?

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HelpfulHarry456
You can create a new EFI partition that's around 1 GB and then follow some repair steps to install the necessary files. There's a guide available that walks you through the process of fixing the EFI bootloader on Windows. Just search for "repair EFI bootloader on Windows" to find those instructions.

CuriousCat789: Does this method automatically detect my Windows 11 installation?

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