Tip: Hosts File Error:: "Please check if this file is opened in another program"

Editing a host file entry required administrator rights.

The host file can be opened in notepad as a plain text file.

If you directly open the hosts file in notepad, (Without using Run As Administrator), you will encounter the following error.

Run Notepad As Administrator, then open the hosts file in notepad

You can then edit and save your host entries.