MSI/WiX doesn't handle this very well natively. LaunchConditions really only
describe conditions that must evaluate for an Install to `Launch`. What you
are describing is what I've come to call `Feature Constraints`. You could use
the Condition table to hide features that aren't installabl
I am doing a registry search to ensure that a certain key is present
before progressing with the installation. However this key is only
required for 1 of my 3 features.
Therefore if feature X is selected then my install should only progress
if the registry key is present, for example
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