I sometimes tell people to try the network troubleshooter if they're having issues because it's idiot proof. All it'll do is occasionally disable and enable a network adapter which can fix some common problems. If you're even the slightest bit tech savvy though, ignore it.
Startup Repair has been useful when I've actually gone to use it, but I can count on one hand how many times I've gotten to that point.
Otherwise, no.