I don't think you ought to delete your hosts file.Do you have a backup of it,if you have deleted it already?The entries you showed were unimmunized do not have to do with your hosts file.->

I have 7977 Uncompleted entries (and 36080 Protected). The Uncompleted entries comprise \Software (Cookies) 148; \Software (Domains) 6857; \Software (IPs) 77; & \Software (Plugins) 895. All other categories are fully immunized.