I'm not sure what happened, but I can't seem to find a solution... I have a laptop (Lenovo yogapad 900) that I used to have a sign-in pin setup on... after a while though (starting around a month or so ago), its suddenly prompting me every time I sign in (boot up, inactivity, closing the lid, hibernation, etc) saying I need to set a pin (with no option to cancel) ... but as soon as I click next it asks me to enter my current pin... and as soon as I do it says "an error has occurred - we cannot setup your pin at this time" and then lets me "skip this for now". I checked in the settings - it claims I have no pin setup (and trying to set one gives the same error as it does at the unlock screen) and because of this, I can't disable it... If this was only happening occasionally, it wouldn't bother me, but having to go through the failed pin creation every time I open my laptop is annoying (and no, I can't turn off the lock screen, I have too much sensitive data on the laptop) and no I dont care if I have a pin or not... its nice since I have a touchscreen, but not required. Any suggestions? perhaps a registry entry needs changing?