The host file is the one where one enters hostname and IP Address pair manually as against being served by a Name server (ex: DNS). As always the "host" file is under C:\windows\system32\drivers\etc\
To edit the host file, Click Start – search for "Notepad", right-click and select "Run as Administrator". This should launch notepad with elevated privileges. Now, open the host file from the File menu, edit and save.
