Windows 11 was released in 2021, but Windows 10 remains a significant presence, with approximately 17% market share among enterprise PCs as of 2026. Lansweeper reports that Windows 10 has lost users, dropping from nearly 50% in early 2025 to around 40% by October 2025, and settling at 16.9% a year later. Key sectors using Windows 10 include healthcare (23%), consumer retail (22.7%), small and medium businesses (21.4%), manufacturing (18%), and enterprises (16.6%). Windows 10 has 1,903 active CVEs compared to 652 on Windows 11, indicating a 2.9 times higher vulnerability. About 14% of Windows 10 users receive Extended Security Updates, leaving 2% on unsupported versions. HP reports that 30% of its installed base still uses Windows 10, reflecting a core group resistant to upgrading. Microsoft states that Windows is active on 1.6 billion PCs globally, with a noted 7% decrease in Windows OEM revenue attributed to lower PC demand and the end-of-support effects for Windows 10.