After finishing my Ph.D. in the summer of 2000, I co-founded Failsafe Technologies. One of our products called Guard-IE was extremely popular and got installed more than 300,000 times. It got reviewed by all the major online magazines as well as various print magazines. We eventually sold the company and our products to EarthLink, Inc.
Reviews of our Guard-IE software (CNet, Wall Street Journal, CNN, ZDNet, Techrepublic, etc):