| Windows 12 | Microsoft | — | Microsoft end-user license agreement |
| Windows 2.0 | Microsoft | 1987 | proprietary license |
| Windows 2.1 | Microsoft | — | proprietary license |
| Windows 2000 | Microsoft | 2000 | proprietary license |
| Windows 3.0 | Microsoft | — | proprietary license |
| Windows 3.1 | Microsoft | 1992 | — |
| Windows 3.1x | Microsoft | — | proprietary license |
| Windows 3.2 | Microsoft | 1993 | — |
| Windows 3.x | Microsoft | 1990 | — |
| Windows 365 | Microsoft | — | — |
| Windows 7 | Microsoft | 2009 | volume licensing, Microsoft Software Assurance, end-user license agreement |
| Windows 7 Ultimate | Microsoft | — | — |
| Windows 8 | Microsoft | 2012 | end-user license agreement |
| Windows 8.1 | Microsoft | — | end-user license agreement |
| Windows 8.1 with Bing | Microsoft | — | — |
| Windows 8.x | Microsoft | 2012 | — |
| Windows 95 | Microsoft | — | proprietary license |
| Windows 95 OSR2 | Microsoft | 1996 | — |
| Windows 97 | Microsoft | — | — |
| Windows 98 | Microsoft | 1998 | Microsoft Software Assurance, proprietary license |
| Windows 9x | Microsoft | — | — |
| Windows Azure | Microsoft | — | — |
| Windows CE 4.0 | Microsoft | — | — |
| Windows CE 5.0 | Microsoft | — | — |
| Windows CPC | Microsoft | — | — |
| Windows Embedded 8 | Microsoft | — | — |
| Windows Embedded Automotive | Microsoft | — | — |
| Windows Embedded CE 6.0 | Microsoft | 2006 | — |
| Windows Embedded Compact | Microsoft | — | end-user license agreement |
| Windows Embedded Compact 7 | Microsoft | — | proprietary license, commercial software |
| Windows Embedded Industry | — | — | — |
| Windows Embedded Standard 7 | Microsoft | — | — |
| Windows Essential Business Server 2008 | Microsoft | — | — |
| Windows for Workgroups 3.11 | Microsoft | 1993 | — |
| Windows Fundamentals for Legacy PCs | Microsoft | — | — |
| Windows Home Server | Microsoft | — | — |
| Windows Home Server 2011 | Microsoft | — | commercial software, proprietary license |
| Windows IoT | Microsoft | — | — |
| Windows Longhorn | Microsoft | — | — |
| Windows Me | Microsoft | 2000 | Microsoft end-user license agreement |
| Windows Mobile | Microsoft | — | proprietary license |
| Windows Mobile 2003 | Microsoft | — | — |
| Windows Mobile 5.0 | Microsoft | — | — |
| Windows Mobile 6.0 | Microsoft | — | — |
| Windows Mobile 6.1 | Microsoft | — | — |
| Windows Mobile 6.5 | Microsoft | — | — |
| Windows Mobile Smartphone | — | — | — |
| Windows MultiPoint Server | Microsoft | — | shareware, Microsoft Software Assurance, Client access license |