Microsoft says precisely the options available to update future users of Windows 8 . The software publisher gives the suggested retail price. Offers limited to 5 licenses updated by the consumer.
To install the updated Windows 8 Pro, it is necessary to have a PC running Windows XP SP3, Windows Vista or Windows 7. You will keep your personal data from Windows XP while your files, installed software and settings will be retained for Windows 7 (ditto for Vista but it will still re-install the software).
Several options are available to perform the upgrade to Windows 8 Pro. It is already possible to pre-order pack update (as a DVD) to Windows 8 Pro. It will cost € 59.99 and you have to go through the Windows Store or from multiple Microsoft re-sellers such as Amazon etc. This is a promotional offer valid until 31/01/13.
As of October 26, it will be possible to download windows.fr for € 29.99 through the update wizard Windows 8 . The promotion lasts until January 31, also.
Finally, if you want to update your PC running Windows 7 purchased between June 2, 2012 and January 31, 2013, a downloadable version of the update will be available at a price of € 14.99 at the launch of Windows 8 Oct. 26 , 2012.