Remove Hxxp://www.ad-factory.co.uk/r.php Redirect from IE/ Chrome/ Firefox

Resent days, many computer users complain that all of their browsers are affected by a nasty redirect whose URL is http://www.ad-factory.co.uk/r.php. Every time they boot up IE, Chrome, or Firefox, it opens 2 tabs - one for the home tab page, and one that immediately first goes to http://www.ad-factory.co.uk/r.php and then lands on a random page like http://www.newsouts.com/?camp=New1w-US and http://www.adnetechy.com/Aff/a.php.