Hi!
We want to make use of the upgrade scenario to deploy Windows 10 on our Windows 8.1 clients. I downloaded the official Windows 10 media from Volume licensing center and imported it correctly into MDT.
When we try to start the upgrade, it fails with following in the BCD.log
4699421/09/2015 13:42:18LTIApplySetup failed to upgrade OS from \\<our MDT server>\DeploymentShare$\Operating Systems\Windows 10 Enterprise x64\setup.exe, rc = -1047526908
4699721/09/2015 13:42:19LTIApplyZTI ERROR - Non-zero return code by LTIApply, rc = -1047526908 0xC1900204
So I've tried to start the ISO manually, wich gives a bit more explanation when we have to choose wich kind of upgrade we want:
"you can't keep windows settings, personal files, and apps because you've chosen to install windows 10using a different language than you're currently using."
That explains a lot. We are using Windows 8.1 client machines with the native en-US language, but have chosen to make nl-NL the default language for our users.
When I run "DISM /online /get-intl" we see clearly: Default system UI language : nl-NL.
When I change this to en-US the upgrade will succeed without a problem. But if we want to change it, we need to restart the machine and boot in a pre Windows environment. If we need to do that on every machine in our company the upgrade will take a lot longer than it should be.
I also tried to import the language pack into the ISO without success :-s
Anyone has an idea? Or a solution to bring the default system UI language to en-US? (like gpo?)