 and congrats on making it to the third and final unit of sailor.org's computer skills and literacy course. Building upon what we learned in Unit 2, this unit extends our discussion of safety and privacy by discussing computer security. Imagine yourself going to a website to pay a bill or check your account balance only to find that someone who is an expert at accessing and viewing other people's information has stolen your username and password for their use. This unit will address situations like this and how to prevent them from happening by examining the importance of computer security while working online, assessing the risks involved and learning some tips for protecting your personal information. We will also spend some time learning how to protect our computers and understand the dangers that you might be exposed to if you neglect to do so. These two topics will drive home the importance of being safe online and understanding the risks involved when performing specific functions online. Now that you are armed with a wealth of information on computer basics, we would be remiss if we did not offer some common troubleshooting techniques. Troubleshooting is a term often used to describe the problem solving that we perform when something goes wrong with our computer. We troubleshoot until we figure out what is wrong and how to correct it. As a computer user or owner, you will likely experience trouble with the computer itself and may feel unsure as to how to solve it. It is common to have technical difficulties with your computer. Sometimes the monitor may not turn on or the computer itself may not start up. This section will provide you with money-saving tips and techniques for diagnosing and fixing common computer issues. This section is especially important since we want to put the skills that we have been learning to use. Please enjoy this last section and remember to take notes. Congrats on making it to the final unit of this course. We wish you the best.