I had to recover a Acer Aspire P3 tablet which, all of a sudden, it showed the message below:


File: BCD Error Code: 0xc0000034

Following few tutorials on the internet ended up as wasted time as any bcdedit commands returned:
The requested system device cannot be found

There were two things that went wrong:
a) tablet was set to boot in UEFI mode, and to get it to boot from a USB Stick (containing Windows 8 Installation iso written with Rufus) the boot type had to be changed to Legacy. To access the BIOS, the Volume UP + Power should be used – and order of the bootable disks should be changed so that USBs are on top.
b) Although many tutorials on the internet mention the C: drive as the container for the BCD file – the trouble was that the container was the hidden ESP partition, which needs a drive letter assigned using diskpart such as Z:


ESP Partition

The solution explaining the last step was found here:


However, there’s a small typo there:

should read:

The boot type (in BIOS) needs to be switched back to UEFI afterwards and the boot order restored (just to avoid booting UEFI USB Sticks by mistakes).