I’ve been unable to open Google Chrome Canary and Chromium. Both programs say application was unable to start correctly.
Difficult to know without you providing some more details. What version of Windows are you using? Were the browsers running fine earlier and only started acting up recently? Is there anything unusual about your setup?
One thing you could try, at any rate, is to uninstall all three browsers, then clean up the system of any vestiges of them (i.e. remove their folders from Program Files Program Files (x86), AppData, and any mention of them in the registry, after you have backed it up, of course!). Then reinstall and try again.