Windows8/8.1 does not come for free; you have to buy it. Microsoft no longer sells 8/8.1. Try amazon.com, etc. Warning: You do not buy a Product Key by itself, as they are normally stolen/pirated, Volume Licenses which are not for private use, or MSDN keys which are not to be sold by the original subscription holder. Windows8.1 is seen as an update/upgrade to Windows 8, rather than a new OS. They do support going to Windows 7 or Windows Vista following the downgrade process in the section above. If you have a legal copy of Windows 8 Installation media and Key, then you can perform a clean install on the system instead. Afterthe installation, the OS would simply verify the product key converting into a "digital entitlement". This process would then let you continue use Windows 10 forever on your PC with free updates. Windows 7 and Windows 8.1 product keys still work to upgrade to Windows 10. It was only supposed to work during the free promotional offer TheWindows Device Recovery tool may continue to provide the recovery image for your Windows Phone 8.1 device . However, after December 16, 2019, you will not be able to recover any apps that were previously downloaded. As with all Windows Phone 8.1 services, the Windows Device Recovery tool for Windows Phone 8.1 will be discontinued over time. .

upgrade windows 8 to 8.1 product key