If you’re experiencing issues with your Windows operating system not booting correctly due to problems with the EFI (Extensible Firmware Interface) bootloader on a GPT (GUID Partition Table) hard drive, there are a few steps you can take to try and resolve the issue.
Before attempting to repair the EFI bootloader, it’s important to note that any repairs done to the root of a hard drive have the possibility of going wrong, which could result in the loss of data on the drive that hasn’t been previously backed up. Therefore, it’s always best practice to perform a full backup of the drive before proceeding with any repairs.
Additionally, the repair process will only work for operating systems installed on a UEFI (Unified Extensible Firmware Interface) BIOS. If your system uses a Legacy BIOS, you’ll need to follow a different set of instructions to repair the MBR (Master Boot Record) instead.
If you have the Windows installation media (DVD or USB), you can use it to repair the EFI bootloader. Here’s how:
diskpart
sel disk 0
list vol
sel vol <number of volume>
assign letter=<drive letter>:
exit
cd /d <drive letter>:\EFI\Microsoft\Boot\
bootrec /FixBoot
If you don’t have the Windows installation media, you can still attempt to repair the EFI bootloader by booting into the Windows Recovery Environment. Here’s how:
diskpart
sel disk 0
list vol
sel vol <number of volume>
assign letter=<drive letter>:
exit
cd /d <drive letter>:\EFI\Microsoft\Boot\
bootrec /FixBoot
After completing either of the above processes, the next step is to rebuild the BCD (Boot Configuration Data) store. This can be done by running the following command:
bootrec /RebuildBcd
If the above steps don’t resolve the issue, there are a few other things you can try:
bootrec /ScanOs
command to scan for other Windows installations and add them to the BCD store.bootrec /RebuildBcd
command to rebuild the BCD store from scratch.In conclusion, repairing the EFI bootloader on a GPT hard drive for Windows can be a complex process, but with the right steps and a bit of patience, it’s often possible to resolve the issue without needing to perform a clean install of the operating system. By following the instructions outlined above and being cautious when making changes to your hard drive, you should be able to get your system back up and running in no time.
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