My PC is running Windows 8 Enterprise X64 (French).
I'm trying to upgrade to 8.1 preview, so I downloaded the 64 bits ISO of Windows 8.1 preview (french):
My I start the setup from the media, the setup does not propose me to upgrade and keep my applications.
Keep personal files only and
Keep nothing are available.
When I read the technet page Supported Upgrade Path, upgrading and keeping everything should be proposed.
Why can't I upgrade? Do I missed something?