i too have changed it but i can still access the website, i assume it just stops the program from accessing it.
All you have to do is to navigate to the file, open it in notepad, make the change and then click save
Mine isn't doing it, keeps telling me:
Cannot creat the C: \Windows\system32\drivers\etc\hosts file.
Make sure the path and file name are correct?
Any ideas why it says this? I am an admin on the pc I'm using...