Did you know Internet Explorer saves the usernames and passwords of your online accounts? This is great when you're trying to log in again later. It's also helpful because you can see what accounts you've created in the past you may have forgotten about.
Unfortunately, you can't just look up the information in Internet Explorer. You need a third-party program like IE PassView.
Not only can you see your passwords, you can delete ones you don't want on your computer anymore. It might be a good idea to clear them out anyway. Any snooper with a program like this can see them if they get access to your computer.
Note: This program might trigger a virus warning on some security software. Don't worry; it's safe.