In some cases, these extra steps may be necessary. If your OS tells you that the file cannot be deleted because it's still in use, open up the Task Manager and terminate all instances of Discord there and in the startup tab. Then find the 'Discord' folder in both of those windows, and delete it.
Then %localappdata% in the run window and hit enter: %appdata% in the run window and hit enter: To find those folders, hit the Start button + R, and enter: (Sometimes stray processes can hide in your system tray or your task manager- double-check those!)
If you clicked the 'Well, it looks like your Discord installation is corrupt.' banner, reinstall Discord using the following steps to get all caught up: We're constantly working on improving Discord's infrastructure to make your chat & voice experience as seamless as possible, but sometimes we confuse this with that and as a result, your version of Discord might not be completely up to date.