Windows users are well acquainted with the operating system update process. New updates are typically released every month and sometimes at even shorter intervals; a process that involves downloading update packages, installing them, and in many cases restarting the computer.
Much of this process can be automated by scheduling updates at appropriate times and installing them during hours when the computer is not in use. However, regular releases of updates continue, raising the question of why Windows constantly needs updates-especially given that new features are not continuously added to the operating system.
There are several reasons for Windows updates, but much of this process relates to system performance and security, not merely adding new features. Sometimes Microsoft releases updates to improve system performance, increase compatibility with applications and devices, fix bugs and software issues, and most importantly, address security vulnerabilities.
The ongoing game between attackers and developers
Security threats and vulnerabilities are continuously identified, and operating system developers and cyber attackers effectively enter a constant competition. When attackers discover and exploit a new vulnerability, developers release patches to counter the threat.
This is where "Patch Tuesday" becomes important; a regular schedule for releasing Microsoft system updates and security patches. Ultimately, ignoring Windows updates can have unfavorable consequences for a computer's security and performance.
How often are security vulnerabilities discovered?
The reality is that security vulnerabilities are identified regularly. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) also continuously publishes alerts and bulletins about known vulnerabilities that have been exploited; an issue that is not limited to Windows and covers various platforms.
On the other hand, the Common Vulnerabilities and Exposures (CVE) program is a place to record and report these issues. Microsoft also provides its security portal to software engineers and researchers to document discovered weaknesses. This information helps Microsoft developers identify vulnerabilities and take steps to fix them.
Then, on the second Tuesday of each month, security fixes are released as system updates within the Patch Tuesday framework. Microsoft has stated that Windows security updates are delivered cumulatively; meaning installing the latest update, even if previous versions were not installed, also provides the user with all prior released security fixes.
This underscores the importance of timely installation of updates and avoiding use of unsupported software versions. Windows 10 is no longer as secure as before, because Microsoft has stopped providing continuous updates for it. Users who still use Windows 10 and have not enrolled in the "Extended Security Updates (ESU)" program may consider doing so.
What about new features and non-security changes?
According to Microsoft's release cycle information, security updates are released monthly and, if necessary, important patches or out-of-band releases are also made available.
According to BGR, Windows clients also receive one feature update annually, typically released in the second half of the year. This update can include new features for the operating system, apps and services, as well as major changes to the Windows build.
Additionally, optional and non-security updates may be released at irregular intervals, bringing new features and improvements to users.
For example, the Windows 11 preview update in February 2026 introduced three new features, including a browser-based network speed test, minor system updates, and performance and usability improvements for File Explorer.
However, preview updates are not part of Windows' stable channel, and the official stable release of features is usually published later; in this case, around March 2026.
This trend shows that Microsoft does not limit Windows updates to fixing security vulnerabilities and also uses them to improve performance, increase compatibility, and deliver new features.