Users who opted to install Windows 8.1 Preview will be able to upgrade as well, BUT… apps will get lost during the upgrade, and I am talking about Metro-style apps and traditional desktop applications. Accounts, personal data, settings and personalization will be preserved, but again users will need to reinstall all the apps. Surface RT users on the other hand will only have to reinstall all modern apps, Office 2013 RT will also remain installed — you won’t have to reinstall this one. So there you go, now knowing how the upgrade Windows 8.1 Preview to Windows 8.1 RTM will work, you can choose whether to try the new version on June 16th or wait for the final version, which will make things a lot easier. SEE ALSO: New Windows 8.1 features include Miracast, NFC, tethering, VPN and more (update) Although there are some assurances about upgrading to the next version of Windows, you should anyways thinks on creating a full backup of your Windows 8 PC before proceeding. This time, you’ve been warned! Update: Source Mary Jo Foley All content on this site is provided with no warranties, express or implied. Use any information at your own risk. Always backup of your device and files before making any changes. Privacy policy info.