Installer Reference Issues?

Okay, so I'm knew to this whole Ccleaner.

I did a registry scan for the Installer Reference Issues and they're mostly programs I've uninstalled.

Is it risky to fix those results that it gave me?

Okay, so I'm knew to this whole Ccleaner.

I did a registry scan for the Installer Reference Issues and they're mostly programs I've uninstalled.

Is it risky to fix those results that it gave me?

If they're definitely uninstalled they should be safe to remove, just make a backup when it asks you, then you can restore it if there is a problem.