VirtualBox - Install, Upgrade

[Tom]

The EXE installer of VirtualBox doesn't appear to support silent installation or upgrading. However, it does contain an MSI which can be extracted like this:
VirtualBox-6.1.38-153438-Win.exe -extract
For some reason it will prompt for elevated privileged even though it merely extracts an MSI to the current users %USERPROFILE%\AppData\Local\Temp folder.

Once the MSI is extracted you just need to upload it and add the usual /qn parameter to make MSI silent.

You are now ready to deploy or upgrade VirtualBox.