Windows Key + Shift + Ctrl + B = ?

Windows 10What is the function of the shortcut combination described in the title? I accidentally pressed them together, the screen blacked out for a flash and I heard a beep (from speakers, not motherboard). But I can\’t figure out what really happened and also can\’t find anything on the internet. 

ddhrubo : Windows 10What is the function of the shortcut combination described in the title? I accidentally pressed them together, the screen blacked out for a flash and I heard a beep (from speakers, not motherboard). But I can\’t figure out what really happened and also can\’t find anything on the internet. That combination tells windows to reset input cards, and graphic cards. Basically it empties the video buffer and restart the driver, and does the same for the keyboard, the mouse and the soundcard. It was made to mimick that functionality on tablets and tactile devices. Helping some users and techs with stuck graphic elements, black screens, stuck sleep modes, stuck mouse buttons and buzzing or looping sounds.  

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