
Remember that the next step will delete all existing information on your computer so be sure to back up what you want to keep. At Where do you want to Install Windows? screen, select Drive options (advanced).At the Which Type of Installation do you Want screen, select Custom: Install Windows only (advanced).

Click the checkbox at the bottom of the screen to accept and click Accept to continue.

Dell factory-installed versions of Windows 8 and 8.1 do not require a product key for Dell computers. Read our article on Windows 8/8.1 product keys for more information. Please check it and try again, or try a different key" If an incorrect key is typed into the box, the line will say, " This product key didn't work. If a correct key is typed into the box, the line below the box will state, " Your product key works! Continue when you're ready The Product Key is a 25 character sequence, separated by dashes.

If you need to get media to repair or restore your operating system to its original factory image, visit the Media Backup page to get information on creating recovery discs from your Dell computer or downloading an image online. This article provides a step-by-step guide for performing a clean install of Windows 8/8.1 on a computer, as well as retail DVD/USB upgrade installation instructions and post-installation setup and personalization. Windows 8/8.1 post-installation actions.Upgrade to Windows 8 from a retail DVD or USB Key.Perform a clean installation of Windows 8/8.1.
