When you try to change the Hosts file or the Lmhosts file in Microsoft Windows Vista, you may receive an error message that resembles either of the following.
Error message 1

Access to C:\Windows\System32\drivers\etc\ hosts was denied

Error message 2

Cannot create the C:\Windows\System32\drivers\etc\hosts file.
Make sure that the path and file name are correct.

This issue occurs even though you log on by using an account that has administrative credentials.