Most of the anti-spyware programs do not block spyware. Most of those that do cost $$$$. Carrr's suggestions are the best ones that clean up the problem afterwards.
None of the software I've reviewed, include the paid ones, are perfect. For this reason it is best to have a combination of tools at your disposal. For example, I run both SpyBot and Adaware daily with a combination of others at frequent intervals.
James P. Cottingham
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To determine how long it will take to write and debug a program, take your best estimate, multiply that by two, add one, and convert to the next higher units.