Installation :: Windows Won't Boot In UEFI Mode - Deleted EFI Partition
Aug 25, 2015
Okay, so the other week i received a new Clevo P650SE laptop. The laptop only had a 500GB 7200RPM HDD with Windows 10 to begin with, so yesterday i added my Samsung 840 EVO SSD. As i wanted this to now be the primary drive, i made another new installation of Windows onto here. After doing this, the system now displayed a boot selection at startup with the choice between the new Windows 10 installation on my SSD or the old one on the HDD.
As i no longer wanted to use the HDD for running Windows, i decided it would be best to delete Windows from this drive. So i booted onto an Ubuntu USB and wiped the entire drive of it's data in GParted, which included three different partitions. This seemed perfectly fine to me at the time, because i had a the new installation from the SSD showing up in the boot manager.
However, when i rebooted the machine and attempted to boot into the new installation on the SSD, it gives me this message:
"The boot configuration data from your PC is missing or contains errors.
File: /EFI/Microsoft/Boot/BC Error code: 0xc000000f"
I have tried everything to recover the system but nothing has worked. Startup repair from my Windows USB doesn't do anything, the system reset wouldn't operate because it stated that the partition was locked.
Nothing with the Command Prompt is working, I have done 'bootrec /fixmbr', 'bootrec /fixboot' and 'bootrec /rebuildbcd', but the last command returns the following error:
"The requested system drive cannot be found."
I also did 'bcdboot C:/Windows' but that also refused to work. I assumed the reason for this might be because the drive didn't have a letter, but when i attempted to add a letter is says:
"The specified drive letter is not free to be assigned."
Both drives in my laptop have now been completely wiped and converted to MBR, but even with the two drives empty the original message still appears when booting my Windows USB in UEFI.
I have only had this laptop a couple of weeks and it's already completely messed up. I can boot the Windows USB in Legacy and install Windows as normal, but of course i'm looking to have it back on UEFI as it was before.
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