The answer to this question is another one that is not a quick one to answer. There are some common telltale signs you can look out for, however. For instance, you may find that you suddenly can’t access your network. You may find that your passwords suddenly don’t work, for instance. If this happens out of the blue, you may have had your passwords changed by a hacker or malicious software. You may also find yourself directed to strange websites no matter what you type into your search bar. Or, it could be as simple as your computer becoming much slower out of nowhere. These are all very general signs, but you can generally tell just by sensing something is different about the computer or network or that your access has been compromised.