For details on what our password complexity requirements are, please see this article.
1. First, press control-alt-delete on your keyboard to bring up the following screen (or one like it):
2. Next, click Change a Password... Enter your old password, then what you would like your new password to be, twice (for validation).
3. Click the blue button, and you're done!
Your other devices and applications will soon prompting you to re-enter your password. Be sure to check the "remember my password" checkbox when presented with one, unless you enjoy being prompted over and over for your new password.