Microsoft's security support for Windows 10 will end on October 14, potentially exposing millions of computers to cyber threats unless users upgrade to Windows 11 or implement other security measures. Users with qualifying hardware can upgrade to Windows 11 for free using the "PC Health Check" app. For computers that do not meet the upgrade criteria, Microsoft will offer paid security updates for a limited time, and users can also enable cloud backup linked to OneDrive as a free alternative. Cybersecurity expert Ken Colburn advises that investing in a new computer is the best long-term security solution, especially for older machines that may not meet current safety standards. He emphasizes the importance of taking action before the deadline to avoid becoming a target for cyber attacks.