Yesterday, I was attempting to log in to one of my desktop computers like I had for the last two years. Normally, I never have problems and today everything I tried failed to log in. I started thinking of all my passwords for all my accounts and tried my others which failed. The username was retyped just in case it was incorrect and I noticed the username was in capitals as it was typed. I had accidentally engaged the Capital Lock mode with the CapsLock key! I depressed it and typed my username and password again and this time I logged into the computer’s operating system. Remember, passwords are case-sensitive while usernames are usually not. This applies to Macs, Microsoft Windows and Linux computers.