Discord has a file called Update.exe which launches the latest version of the Discord client, or updates it if a new version is available. If you're a regular Windows user, you've probably pinned a shortcut to Update.exe on your taskbar for quick access.
The problem: this shortcut breaks more easily than you'd expect. Every time Discord updates, the version folder it points to changes, the icon can vanish, and the taskbar pin can end up pointing at nothing. This guide covers how to fix that, and how to customize the icon while you're at it.
Why the Shortcut Breaks
Discord installs updates into versioned folders like app-1.0.1211, app-1.0.1212, and so on. If you link directly to DiscordPTB.exe inside one of these folders, the link stops working the moment Discord updates and that folder is replaced.