Big problem here...
I am offically locked out of my computer.
Even a wireless keyboard won't help (System prefs not acessible in login screen).
No access to On Screen Keyboard (only Windows has it, Apple, please put On Screen Keyboard on the login screen!)
The keys are (notably) M and N.
The screen bottom part has horizontal lines also.
I did not enable Slow Keys and Mouse Keys.
Just please help me.
Have you tried a USB keyboard?
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