Almost half of global endpoints are still running Windows 10
With its end-of-life date passing this week, the heavy weight of Windows technical debt is impacting a significant number of organisations.
Published on 16th October 2025
Windows 10 has officially reached its end-of-life status (EoL), meaning it will no longer receive crucial security updates, important improvements, or upgrades.
Despite the deadline being public knowledge for years, many endpoints worldwide are still running the OS, risking device takeover, data exfiltration, and a myriad of other threats that are bound to appear sooner or later.
Coinciding with the EoL date, two companies analysed the market to understand just how big the potential threat landscape is, and came back with astonishing results. Cloudhouse surveyed 135 finance IT leaders and found 60% still running “a large number” of servers and desktops with unsupported versions of Windows OS.
The heavy weight of technical debt
At the same time, separate TeamViewer data revealed more than 40% of global endpoints that received support via its platform still run Windows 10. The company analysed an anonymised sample of 250 million TeamViewer connections initiated between July and September 2025, including connections from users with both paid and free licenses.
Windows 10 is still supported, and has no known high-severity vulnerabilities, or zero-days that can be exploited. This doesn’t mean that IT teams aren’t struggling with legacy infrastructure.
In fact, Cloudhouse’s report found 90% of organisations carry Windows technical debt, and more than 59% of finance IT leads are spending too much time maintaining and troubleshooting legacy Windows infrastructure.
Money seems to be the key constraint preventing businesses from migrating to newer tech. The study also found that 95% of respondents wished they could spend more money – and time – on strategic projects, rather than day-to-day maintenance. Still, almost 90% have a plan in place to modernise their infrastructure within the next 24 months.
“Firms shoulder acute operational risk from legacy Windows estates,” said Mat Clothier, CEO at Cloudhouse. “This is a business-critical risk that drains budgets and prevents security and digital transformation work. With major Microsoft support milestones approaching in 2025, firms need actionable, low-risk migration pathways now.”
