If you are talking about Webroot Spy sweeper, they only do a 30 day trial but it's fully functional as far as I know. I downloaded and used the program to get rid of a persistant annoyance about 2 weeks ago.
Webroot no longer supply any free programmes, that work forever. Their trial demo version works as a timed version, and on expiry you will not be able to update, until you purchase the full product.You can still use the demo version of Spy Sweeper, but it will not have the latest updates installed, so possibly allowing new bugs that may invade your computer.
The latest version of Spy Sweeper was recently on sale at PC World for half price,but this as now gone back to full price.
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