Microsoft announced the end of support for Windows 10, leaving approximately 400 million PCs vulnerable unless users enroll in the Extended Security Update (ESU) program. Users of Windows 11 have faced issues, prompting an emergency update. Microsoft warns about the risks of unsupported systems, highlighting that outdated operating systems can serve as entry points for cyberattacks. The company emphasizes that delaying upgrades creates vulnerabilities that hackers can exploit. Unsupported systems pose risks not only to individual users but also to enterprise data security. Microsoft encourages users to upgrade to Windows 11 for enhanced protection and security features.