Windows updates can broadly be classified into three types: security updates, quality updates, and feature updates.
Security updates are released to address vulnerabilities that have been discovered in Windows and its components. These updates are typically released on the second Tuesday of every month, also known as Patch Tuesday. Quality updates address non-security related bugs and issues in Windows. These are usually released once a month, around the same time as security updates. Feature updates include new features and improvements for Windows. They are released two or three times a year, typically in the spring and fall.
While all three types of Windows updates are important, security updates should always be installed as soon as possible to keep your computer safe from attackers who could exploit vulnerabilities to gain access to your data or take control of your system. Quality and feature update can be installed at your convenience, although it’s generally recommended to keep your system up-to-date with the latest releases.