When there is an issue with the master boot record, Windows 10 will not boot up. In those instances, you need to repair the master boot record. On your Windows 10 computer, you can repair the UEFI boot issues with an automatic tool or manually using a Diskpart command prompt. This page gives you the step-by-step procedure to fix the UEFI boot errors on Windows 10 computers. Read this article till the end and fix the UEFI boot issues.
- The automatic repair tool on Windows 10 computers enables you to fix the UEFI boot error. Follow these instructions to proceed further:
- Insert your Windows 10 installation disk into your computer.
- When the Install now screen appears, click on the Repair your computer option.
Make use of the Diskpart command
- Insert the Windows 10 installation CD into your computer’s CD drive.
- When the Install now screen appears, click the Repair your computer option and press the F8 key.
- Now, click on Troubleshoot> Advanced options> Command Prompt.
- On the Command Prompt screen, type the following commands in order:
- list disk
- sel disk 0
- Press the Enter key after each command. When it shows you the message, Disk 0 is now the selected disk, type list vol and press Enter.
- Now, Diskpart will display the list of volumes on your PC. Locate the UEFI volume from the list and enter the following commands.
- sel vol 2
- set id=c12a7328-f81f-11d2-ba4b-00a0c93ec93b
- Or SET ID=ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
- After entering each command, press Enter.
- Assign the drive letter by typing the command: assign letter=G
- Again, open the Command Prompt as an administrator.
- Enter the command cd /d G:\EFI\Microsoft\Boot\
- As you have assigned the drive letter as G, you need to include G.
- Once the boot process gets over, enter Exit.
- Now, to repair the boot record, open the Command Prompt again and type the command: bootrec /fixboot.
- When the repair process gets over, enter Exit.
- To rebuild the BCD store, type the following commands:
- en BCD BCD.old
- bcdboot C:\Windows /1 en-us /s G: /f ALL
- After typing each command, press Enter.
- When this process gets completed, restart your computer and check whether the UEFI boot issue is fixed.
Change the BIOS settings
- Select the boot mode according to your system’s disk.
- If you wish to start an MBR system disk, choose Legacy support.
- If you prefer to start a GPT disk, select UEFI.
- The procedure to change the BIOS settings may vary according to your OS. However, the common keys to enter BIOS on Windows 10 are F1, F2, F10, Delete, and Esc.
It is true that the UEFI boot error on Windows 10 computers is complicated. However, when you approach this issue with the proper troubleshooting techniques, you can fix it without much effort.