Windows 10 cannot start!
I have a Dell desktop running Windows 10. Three days ago, when I turned on the computer, first it showed a blue window with white dots circling around beneath. A few seconds later, the blue window disappeared, and only the white dot(s) circling for hours. The screen is in black. I tried to roll back the update and failed. I even tried to reset the PC, it still could not finished. I tried Microsoft support or Internet search, and I cannot find any solution. Can someone help me to resolve this extremely difficult problem? Thanks.
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