Windows 10’s Stubborn Persistence Poses Security Risks
While many organizations have embraced the transition to Windows 11, a notable segment remains steadfastly anchored to Windows 10. Millions of computers continue to operate on this aging, yet still functional, operating system. However, a recent analysis by asset management company Lansweeper raises concerns that this trend could lead to significant security vulnerabilities.
Lansweeper’s research reveals that approximately 17% of all Windows client devices are still running Windows 10, translating to about one in six machines. This statistic highlights a growing security risk that could have far-reaching implications for the industry.
In contrast, Windows 11 has made impressive strides, now accounting for 78% of Windows devices. Third-party trackers, such as StatCounter, corroborate this trend, indicating that Windows 11 surpassed 70% of desktop share as of February 2026. Yet, a dedicated group of users—ranging from hardcore enthusiasts to everyday individuals—remains reluctant or unable to make the switch to the newer operating system.
Official support for Windows 10 concluded in October 2025; however, Microsoft’s Extended Security Updates (ESU) program will provide eligible devices with patches until October 2027. This coverage, though, comes at a cost for most users. While those in the European Economic Area (EEA) can access a no-cost option until October 2026, others must pay to maintain their security. Lansweeper’s findings underscore the stakes involved in this decision, revealing that a typical Windows 10 device harbors an average of 1,903 active security vulnerabilities—nearly three times the 652 CVE-tracked flaws found on a Windows 11 machine.
The exploitability of these vulnerabilities presents an even graver concern. The research indicates that 66% of Windows 10 vulnerabilities are classified as “high” or “critical,” making them more susceptible to exploitation compared to their Windows 11 counterparts. Although Microsoft routinely addresses hundreds of bugs through its monthly Patch Tuesday updates, Lansweeper cautions that fixes for Windows 11 may inadvertently highlight unresolved issues on Windows 10.
When examining the data by business size, small and medium enterprises emerge as the largest holdouts, with 21.4% of their Windows devices still operating on Windows 10, compared to 16.6% among larger enterprises. Industry-wise, sectors reliant on long-lasting, certified hardware are the slowest to adapt: healthcare and pharmaceuticals lead with 23% still on Windows 10, followed closely by consumer and retail at 22%, and manufacturing at 18%.
In light of these findings, Lansweeper is urging organizations that continue to use Windows 10 to enroll in Microsoft’s Extended Security Updates (ESU) program as a temporary measure to mitigate risks. However, the company emphasizes the importance of addressing the underlying reasons for remaining on Windows 10 as 2026 approaches, advocating for the replacement of aging systems with newer machines. This transition, while necessary, is complicated by the challenging conditions of the current hardware market, which poses its own set of obstacles.
