W10 update from 1803 to 20H2 fails

[Georg Thierry]

I have tried all the measures described in the various topics and cannot get the upgrade to work

The last attempt was via ISO downloaded from MS. Final option option is to wipe and reinstall but I'd like a solution if possible

I have the required logs


Full install failed - 0x8007042B - 0x4000D

Install failed in the SECOND_BOOT phase with error during MIGRATE_DATA operation


OS Name Microsoft Windows 10 Pro

Version 10.0.17134 Build 17134

OS Manufacturer Microsoft Corporation

System Manufacturer LENOVO

System Model 10T7S00800

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