Toshiba satellite c850 black/blue screen with solid cursor after win 10 creator update july 2017. "0" button does not work, f2 and f12 do access bios, but nothing useful can be changed.
Neither tutorial is of any use. F8 and "0" do not work. The tutorial only says what to do when you are in safe mode, not how to get there.
Hello again
Yes, it does explain.
Please read from 'On the other hand, if Windows 10 doesn’t boot properly or no longer allows you to log on with an administrator account, you can enable the legacy Advanced Boot Options menu that allows you to press F8 upon statup. It will display the additional boot options from which you can get to the safe mode in Windows 10.' and follow the steps explained there.