Windows updates are issued regularly, primarily for performance enhancement and security reinforcement. They address bugs, improve compatibility, and distribute security patches to mitigate vulnerabilities. Security vulnerabilities are frequently discovered, with alerts issued by the Cybersecurity and Infrastructure Security Agency (CISA) and documented in the Common Vulnerabilities and Exposures (CVE) program. Microsoft releases security fixes on Patch Tuesday, the second Tuesday of each month, and all updates are cumulative. Users of unsupported software versions, such as Windows 10, face increased security risks. Major feature updates occur annually, with optional non-security updates released periodically. For example, the Windows 11 February 2026 preview update introduced new features, although these are not part of the stable channel.