Yikes! Bought a new MacBook Pro in December 2015 – 13", 128GB. Updated all the software. Running El Capitan 10.11.2. When I boot up by pressing the power button (or key) I see an icon (red lipstick) and my name and underneath that is the password entry line, and underneath that I see "Restart" and "Shutdown." So I enter my password, and the computer gives me an uh-uh, you can't come in. I click on Shutdown, and then I reboot using the power key, and I'm presented with the same options. I carefully type in my password, and the computer says no again. I click Shutdown, and then reboot again by pressing the power key. Third time, I type in my password and – voilà – I'm in. But wait! There's more. a.) This only happens once every three or four log-in attempts. b.) let me assure you, I'm not making a typo when I enter my password. It's the same password I've used on three previous MacBooks, and I've never had this problem before. c.) If I simply close the computer's case and come back after lunch or even the next morning, then when I open the computer I see the icon and the password line, and I enter the password, and I'm in. It always works if I've only closed the case. So why does it only happen from a cold boot? And why does it let me in after three tries? And, once again, I'm not making a typo when I enter the password, so I know that's not the issue. This is my fourth MacBook – three MacBook Air's and now this MacBook Pro, and I've always used the same password and never before had this problem. Any ideas? thanks!