Microsoft’s upgraded Windows 8.1 operating system is available to download now. Windows 8 has not been a good experience for some users and Microsoft has returned with a more stable and easy to use look. The Windows 8 update is available through the Windows Store as a free download. If you installed the preview versions of Windows 8.1, you will have to re-install the apps again when you upgrade to the full version of Windows 8.1. You will have to re install the programs again. So be careful and take all your backups if you are upgrading.