Cannot create the C:\Windows\System32\drivers\etc\hosts file. MISSING OR SPELLED WRONG

Cannot create the C:\Windows\System32\drivers\etc\hosts file.
Make sure that the path and file name are correct. I HAVE TRIED THE START , ALL PROGRAMS,ACCESSORIES =, THE CMD, THE RIGHT CLICK TO RIUN AS ADMIN PLEASE HEP I F POSSIBLE I HAVE CRUCIAL FILES NEEDED FOR SCHOOL