Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of rev-conf.org.
To get there, select the Start menu, followed by the gear/settings icon to the left. In there, choose Update & Security and then Windows Update on the left.
In Windows 10, downloading and installing updates is automatic and will happen immediately after checking or, with some updates, at a time when you're not using your computer.
In Windows 8, Windows 7, and Windows Vista, the best way to access Windows Update is via the Control Panel.
In these versions of Windows, Windows Update is included as an applet in Control Panel, complete with configuration options, update history, and lots more.
Select Check for updates to check for new, uninstalled updates. Installation sometimes happens automatically or it might need to be done by you via the Install updates button, depending on what version of Windows you're using and how you have Windows Update configured.
Microsoft no longer supports Windows 7, and as such, doesn't release new updates. Any updates available via Windows 7's Windows Update utility are ones that have not been installed since support ended on January 24, 2020.
Microsoft no longer supports Windows Vista, and as such, doesn't release new updates. Any updates available via Windows Vista's Windows Update utility are ones that have not been installed since support ended on April 11, 2017.
In Windows XP and previous versions of Windows, Windows Update is available as a service hosted on Microsoft's Windows Update website.
Similar to the Control Panel applet and Windows Update tool in newer versions of Windows, available Windows updates are listed, alongside a few simple configuration options.
Checking for, and installing, uninstalled updates is as easy as selecting those respective links and buttons on the Windows Update website.
Microsoft no longer supports Windows XP, nor versions of Windows that preceded it. While there might be Windows updates available for your Windows XP computer on the Windows Update website, any you see will be updates released prior to the end of support date for Windows XP, which was on April 8, 2014.
More on Installing Windows Updates
The Windows Update service isn't the only way to install Windows updates. As mentioned above, updates to Windows can also be downloaded individually from Microsoft Download Center and then installed manually.
Another option is to use a free software updater program. Those tools are usually built specifically for updating non-Microsoft programs but some include a feature for downloading Windows updates.
Most of the time, Windows updates are installed automatically on Patch Tuesday, but only if Windows is configured that way. See How to Change Windows Update Settings for more on this and how to change how updates are downloaded and installed.