Some installations or settings changes require you to restart your computer. In most cases you don't need to actually reboot it, you only need to restart the explorer.exe process.
Windows 8 also brings a very transparent tool for examining global indices, where you can also optionally keep track of the value of individual shares.
Explorer in Windows 8 is quite updated and it is as much as possible adapted to the user. They have also added the option to quickly access the Command Prompt terminal window.
A less known but very useful feature that works since Windows XP has been released. You can easily rename a bunch of files in a matter of seconds, let me show you how.