To be honest I dont know, in the past month or so I got blue screened 3 times (first time in my life, scared the shit out of me) But I was able to restart it fine every time.
I looked online to see what that message was, like yours it asked me for login information, but it was imgebay something something. but no forum seemed to have a good answer, the best I could find its that it was the host of the ebay's images (not sure if thats the case, but thats the best guess I could find online).
I just decided to reinstall the OS and additional software and everything is running fine, so idk it may have been something my computer caught before I got that message, or the login message may have been a virus.
As a rule of thumb whenever I get random pop up messages that ask for logins or that wont let me use anything, it means I caught something and its time to reinstall shit. Only this time I waited too long and got blue screened lol