In-place upgrade of encrypted Windows systems using reflectdrivers

Apparently since Win10 v1607 there exists a parameter "/reflectdrivers" in the Windows setup (setup.exe on the DVD / USB stick) see https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/windows-setup-command-line-options

This can be used to tell Setup the location of the encryption drivers (eg Veracrypt) and finally be able to perform upgrades without decrypting!

The Veracrypt developer shares this in a forum post and gives a syntax example for his product:

setup.exe /ReflectDrivers "C:\Program Files\VeraCrypt" /PostOOBE C:\ProgramData\VeraCrypt\SetupComplete.cmd

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