Many small and medium-sized businesses still rely heavily on Windows 10 as the deadline for Microsoft to discontinue support approaches. Microsoft’s hardware requirements for Windows 11, including TPM 2.0, aim to establish modern security standards. Peripheral compatibility issues arise as legacy equipment often depends on outdated Windows drivers. Cyber insurance providers are limiting coverage for unsupported operating systems, leading to premium increases for organizations. Successful migrations to Windows 11 can leverage application modernization opportunities, with cloud-native alternatives providing enhanced functionality and security. Windows 11's security architecture supports zero-trust implementations more effectively than Windows 10. The integration of Windows 11's security features with Conditional Access policies allows for improved security controls. Organizations that migrate early can avoid resource scarcity and higher costs associated with the impending deadline. A structured implementation strategy for late-stage planning includes rapid assessment, strategic pilot design, and parallel track implementation for different user categories. The October 2025 deadline for Windows 10 end-of-support emphasizes the need for strategic migration planning to avoid security vulnerabilities and operational risks.