If your PC is currently running Windows 8 or Windows RT, it's free to update to Windows 8.1 or Windows RT 8.1. And unlike previous updates to Windows, you'll get this update from the Windows Store. Windows 8.1 and Windows RT 8.1...
http://www.ebrahma.com/2013/10/update-to-windows-8-1-from-windows-8/Labels: Choose-your-settings, click-Download, Express-settings, Final-updates, Get-the-free-update, Prepare-your-PC, Restart, sign-in, SkyDrive-cloud-storage, Update-to-Windows-8.1-from-Windows-8, Windows-8, Windows-8.1, Windows-8.1-from-Windows-8