Choose Components - this OR that, not both

I have three components. 1 and 2 are normally installed and checked by default. 1 or 2 can be installed separately. But if 3 is selected I would like to disable 1. They can install 1 or 3, but not both.

Can this be done?

have a look at NSIS\Examples\one-section.nsi, should hint you in the right direction

Perfect!

Thanks 🙂