
RadLight's counterattack is a classic example of the kind of technological leapfrog always going on in the world of software. More than 1 million people have downloaded Ad-Aware, according to Stark, and at least 720,000 people have downloaded RadLight from since the program first appeared in February, but the extent of the overlap is unknown. Hard numbers on how many people might have been affected by this game of spyware vs. In addition to the normal run of spyware that comes with a RadLight download, there was an additional program specifically aimed at removing Ad-Aware. But even Stark was caught by surprise at the most recent development: A company in the Slovak Republic called RadLight, which makes a free multimedia player, turned the tables on Lavasoft.

Lavasoft, in collaboration with volunteers all over the world, must constantly update Ad-Aware to take into account clever new technological tricks.

Spyware is a fast-moving business with new entries arriving by the day. His Swedish company, Lavasoft, produces a product called Ad-Aware that searches a computer for hidden spyware, and then asks users if they'd like the program removed. Nicholas Stark has spent the past two years fighting "spyware": programs surreptitiously bundled together with popular software downloads for the purpose of delivering advertisements or tracking personal information.
