If you've treated yourself to the new Fire TV Stick 4K Select, unveiled during a packed keynote event held by Amazon last ...

If the Reddit app on your smartphone isn't working, you can usually fix it by force-restarting the app or your phone.

Malware in the app can drain bank accounts and take over your mobile device -- though Google says Android users are "automatically protected" against the app.

If your Apple Pencil isn't working, you may need to charge it or reset its connection to your iPad and pair it again.