Hack Windows 8.1 to earn $100,000 bounty from microsoft

As part of Microsoft’s bug bounty program, the Redmond based company offers at most $100,000 to security researches that can find flaw in Windows 8.1. The new operating system is expected to be available this June 26.
Currently, there are 3 bounty program by Microsoft:

1. Mitigation Bypass Bounty. Microsoft will pay up to $100,000 USD for truly novel exploitation techniques against protections built into the latest version of our operating system (Windows 8.1 Preview). Learning about new exploitation techniques earlier helps Microsoft improve security by leaps, instead of capturing one vulnerability at a time as a traditional bug bounty alone would. TIMEFRAME: ONGOING
2. BlueHat Bonus for Defense. Additionally, Microsoft will pay up to $50,000 USD for defensive ideas that accompany a qualifying Mitigation Bypass submission. Doing so highlights our continued support of defensive technologies and provides a way for the research community to help protect more than a billion computer systems worldwide.TIMEFRAME: ONGOING (in conjunction with the Mitigation Bypass Bounty).
3. Internet Explorer 11 Preview Bug Bounty. Microsoft will pay up to $11,000 USD for critical vulnerabilities that affect Internet Explorer 11 Preview on the latest version of Windows (Windows 8.1 Preview). The entry period for this program will be the first 30 days of the Internet Explorer 11 beta period (June 26 to July 26, 2013). Learning about critical vulnerabilities in Internet Explorer as early as possible during the public preview will help Microsoft make the newest version of the browser more secure. TIMEFRAME: 30 DAYS

This bug bounty  by Microsoft is the highest of all the existing same programs as of now.