Hello Jon,
Probably you have also backups of the host file there and perhaps a hidden one.
To enable the viewing of Hidden files follow these steps:
1. Close all programs so that you are at your desktop.
2. Double-click on the My Computer icon.
3. Select the Tools menu and click Folder Options.
4. After the new window appears select the View tab.
5. Put a checkmark in the checkbox labeled Display the contents of system folders.
6. Under the Hidden files and folders section select the radio button labeled Show hidden files and folders.
7. Remove the checkmark from the checkbox labeled Hide file extensions for known file types.
8. Remove the checkmark from the checkbox labeled Hide protected operating system files.
9. Press the Apply button and then the OK button and shutdown My Computer.
10. Now your computer is configured to show all hidden files.
Or have a look at
this page to see how to show hidden files and folders.
Best regards
Sandra
Team Spybot