Balto

It is included in 4.7.2. You can see it via the AdminCP > Support page (if there are any changes needed, it'll show up in the top left block). It'll also run on every upgrade to make sure your third party resources are not going to break the new release.

They'll only be automatically disabled if the scanner knows they will break (and I mean completely take your community offline). If you have a plug-in that will cause such an error it will need to be updated by someone. You might need to hire a developer to update it for you if the original author isn't active.