These days, we must all keep track of our online passwords for work and personal use of everything from email to Facebook. Many people use the same passwords for all of their accounts, and it’s often something that’s easy to remember. In some cases, users will go months (or years) without changing their passwords. There are many excellent reasons to change your password. If your computer is infected with viruses or spyware, they be monitoring your online activity. After the computer has been cleaned, it’s a good idea to change your passwords.