Maismarian :
I downloaded and used windows10 yesterday and all was well. This morning I tried to turn it on and it will not accept the password for my Microsoft account. It tells me where to go to reset it but I can't get in to do it.
I had this until I spotted that you can reveal the characters typed into the passsword. (Tiny button just after the pawwword box)
For me, this revealed that the number pad was not operational at the time of passaoed entry. Needed to use the number keys at the top of the keyboard.
Once booted, the number keys work as normal!
This is possibly quite common on USB connected keyboards? Keyboard driver not fully loadedat log in time