zcomputerwiz -
I was unable to run the upgrade via the Media Creation Tool without downloading updates during installation. I attempted multiple times, using varied methods (i.e., running different tools such as Windows6.1-KB3071756-x64.msu, MicrosoftFixit50123.msi, WindowsUpdateDiagnostic.diagcab, stopping WUAUSERV, clearing/renaming SoftwareDistribution, restarting WUASERV in various order) to see if if the Media Creation Toll would then ask me about updates - it never did, it just charged on through with an attempt to upgrade to W10 and failed each time around the same place.
The attached SetupAct and SetupErr logs are from my last/most recent attempt.