I wanted to change my user name that was initially set up for me. When I went ahead and clicked on the user name and with command button activated the ADVANCED OPTIONS, I went ahead and changed the user name. Of course there was a warning there that said, 'warning you may not be able to recover your files if you do this'. You of course ignore this, because I have in all this time of mac ownership never heard of a crash and burn of your data by the simple act of changing your user name. WRRROONNNG! What started as a simple attempt to change the user name resulted in my being locked out of my own computer! HELLO! Anybody home? WHY APPLE? WHY???? YOU ARE SUCH A GOOD COMPUTER. WHY MUST YOU BE SO BIZARRE? I ONLY WANTED TO CHANGE THE USER NAME. WHY MUST YOU TORMENT ME LIKE THIS??? WHY APPLE? WWHHHHHYYYY?? Dude. is there any way I can recover my files. WTF MAN! WTF is wrong with Apple? Changing your user name will lock you out of your own computer????? DUDE.