Windows Phone 8.1
Windows 7, Windows 8.1 si Windows Phone 8.1 upgrade gratuit la Windows 10
Microsoft rupe gura targului, va oferi separe upgrade gratuit la Windows 10 daca utilizati Windows 7, Windows 8.1 sau Windows Phone 8.1 cu licenta. Exista insa si exceptii Windows 7 Enterprise, Windows 8/8.1 Enterprise si Windows RT/RT 8.1. Sursa (in limba engleza): http://www.zdnet.com/