After Windows 98’s live demo crash, Bill Gates had Microsoft build a secret test lab to prevent future embarrassment — “That must be why we’re not shipping yet.”

The dreaded Blue Screen of Death (BSOD) actually comes in three versions. The earliest appeared in Windows 3.1 as a simple Ctrl+Alt+Del screen – often called the ‘screen of unhappiness.’ Then, Windows 95 introduced the BSOD most people recognize. Finally, Windows NT had its own version, originally created by John Vert.

ON THIS DAY: Windows Camera hands-on with slow motion video

To record in slow motion, switch to video mode and tap the turtle icon. Start recording by tapping the video icon or camera button. That’s all there is to it! Slow-motion videos are captured at 720p resolution (1280 x 720) and 120 frames per second, making playback four times slower than normal.