There's one potential issue not with the program itself, though: Is it worth paying for a piece of anti-spyware, when there are several pieces of similar software available for free, such as Microsoft Windows Defender? That will depend as much on the interface as anything else, so if you're not happy with any of the free anti-spyware programs, give this one a try. It features an extremely simple-to-use interface that presents all your options and results in a single screen, and includes tabs for quickly view any spyware you've quarantined, or Web sites you've said are particularly trustworthy.
Note: This download includes the entire Anonymizer Safe Surfing Suite, which consists of Anonymous Surfing, Anti-Spyware, Nyms, and Digital Shredder Lite. You can activate the trial for one or all the included applications. At the end of the trial period, pay for only the parts you wish to keep.