BLACK SCREEN AFTER THE LOGO "DELL" [Closed]

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Registration date
Wednesday August 26, 2015
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Member
Last seen
August 26, 2015
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Hello,I have a "DELL Inspiron 15" laptop.Yesterday I upgraded from Windows 8 to Windows 8.1.The problem is that when I switch on my computer after this upgrading the DELL logo appears and then the blue welcome page appears but afterwards a gray empty screen appears and after some minutes a message appears sayig:"Activate Windows,Go to PC settings to activate Windows."I can not go to PC settings because the usual procedure does not respond.I would be very grateful if you could help me,thanks.