Windows PowerShell 3.0 includes many new and improved features such as easier syntax, better performance, more robustness, and expanded capabilities. Key enhancements include improved Where and Foreach syntax, support for .NET Framework 4.0, enhanced session management using disconnected sessions, updatable online help, integration with Task Scheduler for scheduled jobs, and improved module functionality. The Windows PowerShell ISE also contains new features like code snippets, a console pane, and help window.