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If you for some reason get this error during unattended installation of Configmgr.

The error is in the C:\ConfigmgrSetup.log

“Failed to create process of SetupWpf.exe. return value 1”

Rename HKLM\Software\Microsoft\SMS to HKLM\Software\Microsoft\SMS_old and try again.

The error occur if the installation has been started and fails. In my case it was due to a SQL issue.