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