Beta testing for Kaspersky is one of the most satisfyingly projects that you could undertake.

You are helping build the worlds most secure Internet security program that their is.
This is the Security software that the professionals all use. You help them develop the software, reporting bugs in their excellently run forums. Kasperskys Bugs Forum

Report bugs in the forum, progress and become an active member in the community and you never know you may reach the dizzy height's of being made into a
Gold Beta Tester which brings with it its own special rewards.