Any particular reason CNET is still offering a download link for this 30-day trial product?
Some user reviews are saying they have been defrauded by the vendor.
See: http://download.cnet.com/Adblock-Pro-32-bit/3640-7786_4-11593917.html?tag=main;dropDownForm
and read some users comments below.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic