I ran Dell updates, not related to BIOS or keyboard and now keyboard works again! This is distressing! I have very low confidence in this machine now. I will be purchasing a MacBook and getting a refund asap!
The keyboard is unresponsive when the Pin screen pops up, only way to get past it is to reset pin, create new pin and keyboard starts to work again. It happened last week after a system update! Please update again to fix. Three times I have had to reset pin, use authenticator app to access pc then change pin.
m15 R6, keyboard is locked