Saturday, 24 November 2018

Adding 32-bit UEFI boot options to Strelec WinPE

The English build of Sergei Strelec WinPE only contains entries to boot to Win10 64-bit in the UEFI BCD - no 32-bit UEFI boot options are present for Win10 or Win8. However the 32-bit EFI boot file \EFI\boot\bootia32.efi is already present, so to support booting from 32-bit UEFI systems we just need to edit the BCD...


1. Download the English Strelec Win8+Win10 ISO (or any version?).
2. Convert the ISO to a .imgPTN file (add a good 1GB+ if you want to also install AV updates and PortableApps onto the same partition image later).
3. Copy the .imgPTN file to your E2B drive, make it contiguous and 'switch' to it.
4. Now you can use BootIce to edit the \EFI\microsoft\boot\BCD file on the E2B drive.

Add two new 32-bit BCD entries as shown below using 'BCD - Other BCD file -  \EFI\microsoft\boot\BCD - Easy mode:

Make sure to also set the tick boxes correctly and then click on Save current system.

The BCD file is here if you can't be bothered to use BootIce. Just overwrite the \EFI\microsoft\boot\BCD file that is already present.

Note: For some reason the 32-bit versions are quite slow to get to the Desktop!