I think this is going to be hit and miss trying to find and remove this infection
https://support.microsoft.com/en-us/kb/972034
follow the above link to clean host files.
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let's set browsers back to default
Instructions on how to backup your Favourites/Bookmarks and other data can be found below.
- http://1-ps.googleusercontent.com/x/...1o1xpAkZbO.png Backup Internet Explorer Favourites
- http://2-ps.googleusercontent.com/x/...SnwgqhVB9v.jpg Backup Firefox Bookmarks
- http://i.imgur.com/U5NwUGc.png Backup Chrome Bookmarks
~~
Proceed with the reset once done.