I did a windows 10 upgrade from Windows 7 and the installation went well until my HP printer driver was not working. The new upgrade would not recognize my HP multi purpose printer.
I simply installed the most updated HP print driver for my printer, which WIN 10 again refused to recognize.
I restarted my machine, it Blue Screened and just would HANG.
I interrupted the hang and held the power button down to turn off the machine.
The machine would reboot and then HANG on the blue screen, reboot and then HANG on the blue screen, over and over.
I interrupted the hang again and held the power button down to turn off the machine.
Now the machine will not BOOT, no boot sequence, nothing.