Chalk up one more reason to check out Windows 8.1 Preview when it becomes available on June 26th. Today, Microsoft announced that it'll pay up to $100,000 in cash to those who discover and report novel security exploits within its latest OS revision, along with up to $50,000 in bonus loot for defensive suggestions that relate to the attack. But wait... there's more. Starting on June 26th and running through July 26th, the Redmond outfit will also pay up to $11,000 toward the discovery of critical vulnerabilities within Internet Explorer 11 Preview (Windows 8.1 Preview). Whether you're motivated by your bank account or the good of humanity, you can start taking your best shots at Microsoft's latest code just one week from now.