Both Microsoft Internet Explorer and Microsoft Windows dominate their respective markets, and it is not surprising that the decision to update to the current release of Internet Explorer 7.0 and/or Windows Vista is fraught with uncertainty. Primary in the minds of IT security professionals is the question of vulnerabilities that may be present in these two groundbreaking products. To help assuage this uncertainty, iDefense Labs is pleased to announce the Q1, 2007 quarterly challenge. iDefense will pay $8,000 for each submitted vulnerability that allows an attacker to remotely exploit and execute arbitrary code on either of these two products. Only the first submission for a given vulnerability will qualify for the award, and iDefense will award no more than six payments of $8,000. If more than six submissions qualify, the earliest six submissions (based on submission date and time) will receive the award. The iDefense Team at VeriSign will be responsible for making the final determination of whether or not a submission qualifies for the award.