https://sourceforge.net/p/veracrypt/discussion/general/thread/de2db6e2f5/
> Full changes between 1.25.7 and 1.25.8_BETA (2 February 2022) :
>
> Windows:
> Make MSI installer compatible with system encryption.
> Set minimum support for MSI installation to Windows 7.
> Fix failure to create Traveler Disk when VeraCrypt is installed using MSI.
> Fix double-clicking mounted drive in VeraCrypt UI not working in some special Windows configurations.

システムパーティションを暗号化してる環境でもMSIでのインストールが可能になる、と