I had been trying to edit the hosts file on vista but always receives a message saying no privilege. I didn’t even recall setting up an admin user during vista installation.
Finally found a solution on the Internet:
http://www.maximumpcguides.com/edit-the-windows-vista-hosts-file/

Open Notepad with Administrative privileges by clicking Start, All Programs, Accessories, and then right-click Notepad and select to open […]

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