Download Windows 8 Metro Task Manager for XP, Vista and 7
http://www.deviantart.com/download/300826389/windows_8_metro_task_manager_for_xp__vista_and_7_by_vishal_gupta-d4z3r4l.zip

You'll need to install .NET Framework to use it. (http://www.microsoft.com/downloads/details.aspx?familyid=9CFB2D51-5FF4-4491-B0E5-B386F32C0992&displaylang=en)

You can pin it to Taskbar, create a shortcut on Desktop, Quick launch toolbar or add it to Desktop context menu for quick and easy access.