you need the right Install DVD/USB ISO/ESD Files...
I need to repair my Windows 10 installation. Where can I get a clean ISO (with install.wim, no Install.ESD, so that I can run DISM against the WIM) of the specific Windows 10 build required for thi...
superuser.com
if You use RUFUS to create media
The Reliable USB Formatting Utility. Contribute to pbatard/rufus development by creating an account on GitHub.
github.com
TARGET SYSTEM MUST BE CSM
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Why doesn't Rufus create a Windows installation USB that can be booted in dual BIOS/UEFI mode?
If you are using a Windows ISO that can be dual booted in UEFI or BIOS mode, you may find that the USB created by Rufus does not preserve the dual UEFI+BIOS boot feature.
Especially, the Windows 8 or later installation ISOs, that support both UEFI and BIOS boot, will be converted to either one or the other mode, depending on the option you selected under
Partition scheme and
Target type: If you select
MBR and
BIOS or UEFI-CSM, the USB will be bootable in BIOS-mode only (even on UEFI systems), and if you select
GPT then the USB will be bootable in UEFI mode only (and not bootable on a BIOS system at all).
This is done to avoid confusion, as it can be difficult for non-expert users to know whether they actually booted in UEFI or BIOS mode when a USB Flash Drive can be booted in both modes, and installation is meant to be a one-off operation, targeting a very specific machine and boot mode. You probably don't want to go through a full Windows installation, only to realize that it was installed in BIOS mode when all you really wanted was UEFI mode.
By ensuring that only one or the other can be used for Windows installation, there is no room for error with regards to which mode was used.
Note that this does not apply for Windows To Go and that you can also enable dual UEFI+BIOS boot by using the Alt-E cheat mode (see
below) with Rufus 2.0 or higher. Also, if your UEFI firmware integrates an NTFS driver natively, then you may also find that you can dual boot a USB created in Rufus, even if only BIOS-CSM was specified.