Restoring UEFI Boot from Legacy Boot

F5F Stay Refreshed Hardware Desktop Restoring UEFI Boot from Legacy Boot

mikeinsaw
Member

162

08-31-2020, 10:17 PM

I recently upgraded the MOBO and CPU on my PC without changing any other hardware. I couldn’t boot using UEFI and had to enable CSM/Legacy boot, which let me access my original Win10 SSD. I’m trying to turn on the resizable BAR in BIOS, but it only works when switching to UEFI Boot. I’m wondering if there’s a way to fix or reformat my Windows drive so it works with UEFI boot mode, without needing a separate setup to reformat the SSD.

mikeinsaw

08-31-2020, 10:17 PM #1

DeadpoOol
Member

175

08-31-2020, 11:29 PM

Use the mbr2gpt utility to transform the OS drive from MBR format to GPT style partitioning. After completion, you can transition to UEFI mode. Follow the provided instructions for proper usage.

DeadpoOol

08-31-2020, 11:29 PM #2

Use the mbr2gpt utility to transform the OS drive from MBR format to GPT style partitioning. After completion, you can transition to UEFI mode. Follow the provided instructions for proper usage.

ScopeZMLG
Member

09-06-2020, 02:14 PM

ensure your information is safely stored

ScopeZMLG

09-06-2020, 02:14 PM #3

ensure your information is safely stored

SrNegue_4K
Junior Member

09-06-2020, 06:57 PM

Performed the steps as instructed, and everything is functioning properly from UEFI Boot now. Including the re-BAR support I needed. Thanks!

SrNegue_4K

09-06-2020, 06:57 PM #4

Performed the steps as instructed, and everything is functioning properly from UEFI Boot now. Including the re-BAR support I needed. Thanks!

Just_Ricardo
Member

136

09-07-2020, 12:36 AM

Great.
👍

Just_Ricardo

09-07-2020, 12:36 AM #5

Great.
👍