How to shutdown, restart, logoff using command promp

Windows provides a builtin command to shutdown, restart as well as logoff a user from the command promptne. This and many other options are provided by the “shutdown” command. In order to find out more options of any command, type :
shutdown /? – command name followed by a forward slash and a question mark.
in Command Prompt ( WIN + R » cmd – here are some more Windows Keyboard shortcuts. You can run any command from Command Prompt or typing the command with full option into the RUN Dialog ( WIN + R ) The main use of all these commands come in batch files and task scheduling. All of these commands are pretty easy to use, please read the article completely before complaining

Changing the Product Key for Office 2010 or Office 2013

Determine the Product Key with a 3rd party tool

Determining the used Product Key when using Office 2007 or previous isn’t directly supported by Microsoft. However, you can use a little program called Magic Jelly Bean Keyfinder to find out your used Product Key. Simply install and run the application to find out the Product Key (note: during the installation, there will be a prompt to also install a sponsored application which you can choose not to install).
Another fee application which you can use is Belarc Advisor. This application does a bit more thorough scan of your computer for which it generates a report that also includes license keys for several of your installed applications. If you are in a large corporate network, you might want to disconnect your network connection as it will also try to build a network map which may cause the application to appear to hang at the “checking the local network of this computer” stage.

Change Product Key Office

• go to control panel 
• open "add or remove "