Millions of enterprise devices are still using Windows 10, with a report indicating that half of all business-managed Windows devices have not transitioned to Windows 11. In the healthcare sector, 19% of devices are too outdated to upgrade without replacement, and the finance sector also shows slow modernization. The Americas have only 43% of enterprise devices upgraded to Windows 11, while Europe has a 70% upgrade rate. Larger organizations managing over 10,000 devices have completed only 42% of their migrations due to complex environments and aging infrastructure. Microsoft is offering paid support through its Extended Security Updates (ESU) program, and third-party provider 0patch plans to deliver security fixes for at least five years after Microsoft's support ends.