One of the newest features in Windows 8 is the new Task Manager. Microsoft gave the Task Manager a complete overhaul that includes several performance tools to help you optimize your PC. In an official blog post, Microsoft goes over these optimization tips. Microsoft has also posted up a video that showcases these tips in action.
You could launch the Task Manager in Windows 8 by pressing Ctrl+Shift+Esc? The Task Manager in Windows 8 is different from the one in Windows 7, featuring a new Processes tab that has been completely redesigned, Performance and Networking tabs have been merged, and new tabs such as App History and Start-up have been added to the Task Manager.