Problem signing into Windows 8.1

I closed my computer down (PC) windows 8.1 two nights ago and all was well.
New morning, all is still well until it came to typing my password in (which I know to me).
Tried to type in the password but it was as if the keyboard was not working.
Nothing. Very frustrating to say the lest. I know the keyboard is working.
Can someone please help this senior Tasmanian regain his lost sanity.
7:00pm Tuesday here, not sure what it is in the States.
Thanks.

brisaac37.
Is your computer a desktop?...is your keyboard Bluetooth, if so check the batteries. Try changing USB bluetooth connector to another position.
If the keyboard does not use batteries try changing to a different USB connection on your computer.

Is the CapsLock on perhaps?