Best way to handle a prerequisite that may already be installed?

[eddyevans]

Hi everyone,

I'm working on an installer where one of the prerequisites may already be installed on the target machine, but the version can vary between users.

What is the recommended way in Advanced Installer to detect the installed version and only install the prerequisite when the existing version is missing or too old? I’d also like to avoid unnecessary repairs or reinstallations on machines that already have a compatible version.

Would appreciate any advice or examples of how others handle this.

[Catalin]

Hello and welcome to our forums,

You can have the prerequisite detection criteria as something that involves a version.

For example, a registry search that looks for a version.

With such search, you can also set a minimum version.

An example of that would be the following search type:

Screenshot_174.png (22.81 KiB) Viewed 1093 times

Similarly, the "Registry value contains version" also has the minimum and maximum fields:

Screenshot_175.png (19.91 KiB) Viewed 1093 times

Hope this helps!

Best regards,
Catalin