Use a Hosts file and SMS to Block Pop-ups and Spyware
Anyone who has surfed the Internet during this past year has knowingly, or unknowingly, picked up some kind of spyware along the way. In the corporate environment, this can become a never-ending battle, especially for traveling users. Most users and their systems are protected when on the corporate WAN by antivirus or other software. However, support personnel may spend hours cleaning a system only to have the system get hit again when the user is home or on the road.
Here's one solution that uses Systems Management Server (SMS) and a modified host file to help keep systems safe from ads, banners, cookies, Web bugs and even most hijackers.
http://searchwinsystems.techtarget.com/tip/1,289483,sid68_gci1084188,00.html?bucket=ETA