Many users have already downloaded and installed Window 8.1 Preview on Surface Pro tablet or PC computer to test the latest stuff. I have kept getting Load Library failed with error 87 and restore it to original settings but not working. Is there a way to downgrade from Windows 8.1 Preview to previous Windows 8 operating system?
Microsoft has made sure that you can not uninstall Windows 8.1 Preview. but it is only possible to use the Windows 8 Refresh or Reset feature in PC setting to restore to factory condition. This process will remove the preview and all installed app, without losing your personal files and documents.
If you so that by Windows 8.1 Preview upgrades ISO file, you have to reinstall Windows 8 by DVD media coming with the PC or Recovery option. If you are using from non-Windows 8 OS, like Windows XP, Windows Vista, or Windows 7, it is no way to uninstall it. So the way is to reinstall your OS completely.