This is a web exclusive session which was not delivered at PDC2008, but provides complimentary content aligned with PDC. How does Windows use code signatures to enhance security? How do I sign my application to get the best user experience with features in Windows 7? How can my application's security benefit from verifying code signatures? This session will review key features in Windows 7 that leverages code signatures, such as signing for Internet Explorer, 64 bit kernel, User Account Control (UAC), and Software Restriction Policies (SRP). We will show you best practices and review common mistakes when signing code. We will also show you how to sign your application's product updates and verify signatures from within your application.