“Incorrect password or unknown username

Receiving the error “Incorrect password or unknown username for \\owacad02\C$” when executing MSDos prompt and a few other applications. This workstation has a new image that was copied from another workstation with a different computer name. I am thinking that the ownership still belongs to the workstation that the image was copied from. I need additional ideas. Do I change the ownership of all files in the directory system32? Imagecast is the imaging software.