* Create a [good looking MUI Installer](https://nsis.sourceforge.io/Docs/Modern%20UI/Readme.html)
* Sign the installer
* Requires to [buy a certificate](https://comodosslstore.com/resources/free-code-signing-certificate/)
* Maybe there can be a [free one for open source programs](https://www.codenotary.io/with-codenotary-you-never-have-to-pay-for-code-signing-certificates-again/) - Not yet read thoroughly whether there is a catch.