Guide How to Upgrade Windows 8.1 customer preview to Windows 8.1 RTM Final Version
As most of perople knows, Windows 8.1 RTM is available for download for volume license subscriber. If you upgraded to the Windows 8.1 Preview from Windows 8 and when you upgrade to the final version of Windows 8.1 RTM, you will only be able to save your personal files, all of your installed Programswill need to be reinstalled.
Those who installed the consumer preview version of Windows 8.1 will need to reinstall their apps (Metro-Style and desktop) when moving from the preview to the RTM bits on both Intel and ARM hardware, officials said. If you didn’t install the preview and want to go straight from Windows 8 to Windows 8.1, you won’t have to reinstall apps.
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