Why is the Alt-Tab shortcut not working on Windows 10? Learn how to fix the Alt-Tab key shortcut not working on Windows 10 by reading our article. It’s essential to anyone that frequently toggles between their apps to achieve more efficient work. It’s easy to see why the shortcut not working could cause issues for many people. The most used one is pressing the Alt and Tab keys at the same time, allowing you to see an overview of your open windows and switch between them at lightning speed. Windows is packed with useful keyboard shortcuts that make it faster to navigate your system.