There are several possible reasons why Alt Tab may not be working in Windows 11. Some of the most common causes include:

Open Task Manager ( Ctrl + Shift + Esc ), locate Windows Explorer under the Processes tab, right-click it, and select Restart . This refreshes the user interface shell and fixes sudden shortcut freezes.

Press the Right Alt + Tab keys instead of the left side. If this works, your left Alt key may have a hardware defect or a specific software block.

The shortcut is a core multitasking tool in Windows 11. When it stops working, it significantly slows down your productivity. This issue usually occurs because of misconfigured multitasking settings, frozen system processes, conflicting keyboard layouts, or problematic display features like Game Mode .