In the Mouse Properties window that opens, locate your touchpad settings. They are usually under the far-right tab next to Hardware (the tab's name varies from manufacturer to manufacturer). Ensure there is a check in the box next to Enable touchpad. Adjust any other settings to your liking, then click Apply, then OK.

Once the keyboard is plugged in, check if the ALT + F4 shortcut is working. Fix 9: Disable Legacy Fx Function. If you are troubleshooting an issue with the ALT+F4 shortcut not working to close apps, you can try this alternate method to disable the legacy Fx function in the BIOS. Switch off your PC. Then press the Power button to restart.

Rename the BIOS file to ZG5IA32.FD, that’s important. Do not remove the USB stick. Turn the AA1 off, make sure both battery and AC adapter are connected. Press Fn+Esc, keep it pressed and press the power button to turn the AA1 on. Release Fn+Esc after a few seconds, the power button will be blinking.
Well, it looks like mine randomly started working again as well. Can confirm hitting the F8 keyboard light key does NOT show an indication on screen. It just rotates through Bright/Dim/Off. My swift 5 backlight for the keyboard suddenly not working. Fn + F8 also doesn't seems to make it back light up.
Note: The laptop was docked and connected to an external keyboard during the entire update process. It might not have installed the driver due to that. Things I've tried: -Restarting. -Uninstalling all devices under "keyboards" category using device manager and restarting (clicked show hidden devices)
Reset your wireless keyboard. If you have a wireless keyboard, the steps for resetting it will vary slightly from a wired keyboard. To reset a wireless keyboard: Turn off your keyboard. With the keyboard turned off, hold down the ESC key. While holding down the ESC key, turn on your keyboard. After about 2 to 5 seconds, release the ESC key. Check if you can turn the keyboard lights on or off using the keys. The keyboard backlight has three modes: Off, Low, High. In some keyboards, the combination is Fn+F4. In some it is Fn+F5. On L1b7.
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    • acer laptop keyboard suddenly stopped working