Look through our 'most popular' downloads and the list is saturated with free anti-spyware tools, often from software developers who have other editions and produce a free stripped version, free of charge. However, these versions are less pro-active than their commercial rivals. For instance, use the basic free version of Ad-Aware 2007 and this requires manual intervention to pro-actively safeguard your system from intrusion. You'll have to check your system manually, make sure definitions are updated and more. Do you want to take this potential risk if you use your system for work?
Ad-Aware 2007 Plus edition is a step-up from the free version and is far more pro-active in the way it will prevent malicious software from attempting to enter your system. You can setup automatic system analysis and definition updates, for example.
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