Windows 10 gives you absolutely the best experience for doing what you do. And always-enabled updates help you stay current on features and security for the supported lifetime of your device. Windows 10 is designed to be compatible with the hardware, software, and peripherals you already own. If You have these editions on you computer, you need to make a clean installation after purchasing Windows 10 Professional. WMC) CANNOT be directly upgraded to Windows 10 Professional by changing product key in Windows system. Windows 10 Home, Windows 7 Home Basic/Premium and Windows 8.1 CoreCountrySpecific/CoreSingleLanguage/Chinese (incl. Windows 10 Professional CD-KEY (32/64 Bit) works only for Windows, not for Mac!