Installing app updates on a phone is pretty simple these days: if you have an iPhone, the App Store handles updates. And while Android users can sideload apps or install third-party app stores, most app updates are probably handled by the Google Play Store. But installing updates on a PC? That's a messier proposition. Microsoft has its own app store, but odds are are that most of the apps you're using were downloaded and installed from the web and feature their own app update systems (if they have one at all).