It's easy to connect to your network - most of the time. However, there may come a day when you turn on your laptop, try to get online, and get hit with an error message. One common and very easy to resolve message you may receive is "Network Security Key Mismatch." However, if you've never seen this error before, you may be confused as to what it means and how to resolve it. Luckily, this is an easy error to clear that doesn't take much tech expertise.