My wife and I both have had Kindle Fire tablets for a couple of years, no problems or serious complaints. We use them primarily for reading e-books, email and watching videos. My brother bought a Kindle Fire several months ago, and is now complaining that his tablet "has a virus" (apparently, it abruptly shuts down at random). I never thought much about the risk to our tablets, so my first question is: Can a Fire get a virus?