Upgrade Windows 10 using an existing ISO file.
Upgrade Windows 10 using an existing ISO file.
Using the MediaCreationTool, can you find a way to apply the previous ISO (a 3GB file that was already downloaded) during Windows 10 setup? This would avoid having to re-download the entire 3GB every time. It feels really wasteful, especially on DSL connections where each attempt takes a long time. I’m stuck with this generic error and no clear solution—can’t tell if the PC is ready to proceed. Please try running setup again.