I upgraded to win8.1 preview on my inspirion 15.  Now I realize I need win 8 pro (64-bit).

Can I upgrade and how?  Will I lose 8.1?

Hi Walter,

You will need to reinstall to downgrade from Windows 8.1 Preview to Windows 8.

For more information please post on the Windows 8 forums on http://answers.microsoft.com .

The Windows Phone Development forums are for developers to discuss writing their own apps to run on Windows Phone.

--Rob

Hi,

Uninstalling Windows 8.1 preview isn't supported. However, it may be possible to restore your entire system to its factory condition.

If your PC came with Windows 8 preinstalled, then you may be able to restore it back to Windows 8 by using PC refresh. Your personal files won't be affected, but apps that did not come with the PC will need to be reinstalled and apps that you installed while using the preview may not be available through the Windows 8 Store.

If you're running Windows 8 and you install the preview using the ISO, you won't be able to uninstall it. You'll need to reinstall Windows 8 using recovery or installation media that came with your PC.

Hope these could be helpful.