Your computer is part of a domain, it is giving the error about login servers as it is trying to access the domain server to validate user login to the domain server and apply security permissions and resources. Since the computer was not "disconnected" from being linked to the domain before it was removed it can not easily be "disconnected".
If you are wanting to reset the computer to factory, you should be re-installing windows, not trying to boot into it anyways.
If the computer is not too old (like before 2005) then it should have a recovery partition to wipe it back to factory, you just need to google instructions to do so for your particular computer. OEMs use different keys and different menu options and then change those...