At the moment I have the win 8.1 preview installed in my old Dell laptop which used to run Vista. It was a clean install and I never had the Windows 8 RT ( I could have it for $39.99, but I declined to do so.) Question : When the final release of Win 8.1 is available for public, do I have to buy it? I came across this article : http://www.nextofwindows.com/what-you-need-to-know-before-installing-windows-8-1-preview/ excerpt........ Your Windows 8.1 preview will expire in less than 7 month. Because we are expecting a final release of Windows 8.1 releasing later this year, it makes sense to set the expiration date a little after, which leaves you plenty of time to upgrade to the final release. You will be still able to use the Windows 8.1 preview, but will be restricted just like Windows 7 does. Question : what restrictions ? Will it run just like it is now or will I lose some of the applications and options? Thank you.