Hosts file in Windows XP automatically deleted [closed]

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http://serverfault.com – I am not sure what happened but the Hosts file which I had previously was automatically deleted, and when I had recreated a new host file, it worked, since I had installed WordPress on my machine. But strangely now the host file has been renamed to tmphosts, I am not sure what is causing this automatically change in the hosts file. Can someone suggest a possible solution, or can i able to diagnose, what is the reason for the files getting deleted? (HowTos)