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Look for a zero-tolerance spyware policy before trying an unknown program:

SnapFiles has a zero tolerance policy when it comes to adware/spyware/malware or whatever you may want to call it. We do not list any software that includes third party advertising or tracking components of any kind. Every program you find on our sites has been downloaded by us, installed on our machines, and (as part of the review) tested for any type of malware and viruses, using several industry leading products.

http://www.snapfiles.com/adware_spyware_concerns.html