Use of this OEM System Builder Channel software is subject to the terms of the Microsoft OEM System Builder License. This software is intended for pre-installation on a new personal computer for resale. This OEM System Builder Channel software requires the assembler to provide end user support for the Windows software and cannot be transferred to another computer once it is installed. To acquire Windows software with support provided by Microsoft please see our full package "Retail" product offerings.

Looking for your product key? The product key is a 25-digit string with a hyphen between each 5 digits. It will say "Product Key" before 25 digits or have an image of a key next to 10 digits with the remaining 15 on the next line below. The Product Key is generally located in the lower left corner of the DVD case, on the disc itself, or on a leaflet in the packaging you received.

This operating system is eligible for a free upgrade to Windows 10 when available. More details below.

The Start screen. Personalize your Start screen with your favorite news, friends, social networks, and apps. Customizable colors and backgrounds and four different tile sizes make your device as unique as you are.

The apps you want. In addition to great built-in apps for e-mail, people, photos and video editing, you can also download thousands of popular apps from the Windows Store, including Netflix, ESPN, Skype, and Halo: Spartan Assault.

It plays as hard as it works. Windows 8.1 gives you the power to quickly browse, watch movies, play games, polish your resume, and pull together a killer presentation - all on a single PC.