Consumers and small businesses who have PCs running Windows 7 SP1 or Windows 8.1 will be offered a free online upgrade to Windows 10.
- Windows 7 Home Premium and Windows 8.1 systems will receive an upgrade to Windows 10 Home.
- Windows 7 Professional, Windows 7 Ultimate, and Windows 8.1 Pro systems will be upgraded to Windows 10 Pro.
Microsoft has not yet disclosed whether and how it plans to offer Windows 10 for upgraders who prefer physical installation media or who have PCs running Windows Vista, which doesn't qualify for the free Windows 10 upgrade. Likewise, the company has so far declined to discuss how it plans to offer Windows 10 for enthusiasts building their own PCs.