Setup a new laptop for someone (early this year I think?) with the semi-preinstalled Win10 and I absolutely had to disconnect from wifi before I could use a loc

Setup a new laptop for someone (early this year I think?) with the semi-preinstalled Win10 and I absolutely had to disconnect from wifi before I could use a local account. Maybe a secret key combo exists but I don't know it). Been about two years since I installed it clean from an USB stick, so I don't remember if it was the same there.