The main reason is usually a missing or wrongly set AltTabSettings registry value, which turns off the task switcher feature. Other common causes include fullscreen optimizations being on, outdated keyboard drivers, or third-party apps that change how your keyboard works. In this article, we will discuss different ways to solve this error.
1. Restart Windows Explorer
The easiest and quickest solution to this problem is to restart Windows Explorer. Sometimes, Windows Explorer can encounter an error that disables Alt + Tab.
2. Use Registry Editor
Some third-party applications can change registry settings that impact how your keyboard works. The registry entry called ForegroundLockTimeout may be set to a value that prevents Alt + Tab from working. You can fix this by changing the ForegroundLockTimeout value to 0:
3. Disable the Game Mode feature
Some gaming keyboards have a Game Mode feature that disables certain keys or key combinations, such as Alt + Tab, Alt + F4, and the Windows key, to prevent accidental presses during gameplay. Check if Game Mode is enabled: – Press the Windows key. If nothing happens, Game Mode may be on. If the start menu opens, Game Mode is already off. There are two ways to disable Game Mode. You can either use a specific key combination (commonly Fn + F10 on many keyboards) or use the software provided by your keyboard’s manufacturer. If you’re unsure which key combination to use, check the user manual, visit your keyboard manufacturer’s website, or use their software to turn off Game Mode.
4. Reinstall the keyboard driver
Outdated or corrupted keyboard drivers can also cause this issue. Reinstalling the keyboard driver can help:
5. Run Keyboard Troubleshooter
Windows offers a built-in troubleshooter for keyboards and other hardware devices. This tool can often find and fix software issues automatically.
6. Uninstall third-party keyboard apps
If you’ve installed any third-party software that customizes how your keyboard works, it may have disabled the Alt + Tab functionality. Uninstalling such applications can help restore normal function.
