Invalid user/password/domain

[Ben Pfahl]

I accidently made a change and now my login screen is not
asking me for the Domain name as it has done in the past.
Even though I'm entering the correct user and password, it
gives me an error.

Is there any way to bypass the username/password in the
beginning? Or, can I revert the system configuration back
1 week?

Thank you,
Ben

 

[harald_vdh]

Boot in safe mode without network,
and then log in.