Screen lock pattern suddenly invalid, unable to change

My screen lock pattern suddenly changed without my knowledge or authorization. Since no one else has access to my phone, i think it might be a glitch. I attempted to change the pattern lock back to the pattern i always use, and was unable to. Asus customer service advised me to hard reset. Unfortunately, i had to get off the phone before i could have him walk me through the reset.
Later on my own, i attempted the reset. i discovered i was unable to set up fingerprint authentication without the pattern or a pin, so i tried to set it up with a pin, and received the error "unfortunately, settings has stopped." After this it would request a pin in order to change/set up authentication, and the pin i enter is invalid!

What is wrong? How can there be two pattern locks- one valid only for start up but not screen lock? How can i fully wipe this phone to set up authentication again without errors?

Hi kellylence,

Do you mean the pin you set up is valid for start-up process, but invalid for screen lock?

How you unlock screen? fingerprint?

FYJ_ASUS posted on 2017/4/27 01:29
Hi kellylence,

Do you mean the pin you set up is valid for start-up process, but invalid for screen ...

Yes, exactly. The pattern lock would not unlock my screen, but when i shut down/restarted the phone, the pattern suddenly worked. Then, once the phone fully booted, the pattern would not work to unlock the screen.

I couldn't get into my phone so i did a hard reset, and still having some problems, i am not using a screen lock at all.

kellylence posted on 2017/4/28 20:35
Yes, exactly. The pattern lock would not unlock my screen, but when i shut down/restarted the phon ...

Hi  kellylence,

Sorry for my late reply.
Which firmware version are you currently on?
D you still encounter the same problem after reset?

Thanks.