How to Install the Latest Version of Windows 10
The latest version of Windows 10 is the November 2021 Update, version "21H2," which was released on November 16, 2021. Microsoft will now release new major updates every year.
These major updates can take some time to reach your PC since Microsoft and PC manufacturers do extensive testing before fully rolling them out. Let's take a look at what's included in the latest version, how to find out what version you're running, and how you can skip the wait and get the most recent version if you don't already have it.
The Latest Version Is the November 2021 Update
The latest version of Windows 10 is the November 2021 Update. which was released on November 16, 2021. This update was codenamed "21H2" during its development process, as it was released in the second half of 2021. Its final build number is 19044.
Windows 10's November 2021 Update is a small update that focuses on bug fixes, just like the May 2021 Update and October 2020 Update were before it. It does have a few other small changes, including compatibility with the "SAE Hash to Element" security standard used by some wireless WPA3 networks and GPU compute support for the Windows Subsystem for Linux.
How to Check if You Have the Latest Version
To see which version of Windows 10 you have, open your Start menu, and then click the gear-shaped "Settings" icon to open the Settings app. You can also fire up the app by pressing Windows+I.
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Head to System > About in the Settings window, and then scroll down toward the bottom to the "Windows Specifications" section.
A version number of "21H2" indicates you're using the November 2021 Update. This is the latest version. If you see a lower version number, you're using an older version.
Note: 21H2 is a smaller update, so the "Installed On" date may not be updated here and may show a date in 2020 instead of 2021. Rest assured that, if the Settings app says you're using version 21H2, you have the latest version.
If you see a higher version number than 21H2 on your system, you're likely running an unstable Insider Preview version of Windows.
How to Update to the Latest Version
When Microsoft provides the update to your PC, it automatically installs itself. But Microsoft doesn't offer new Windows updates to all PCs at once. Instead, Microsoft rolls them out slowly over time, after both Microsoft and the various PC manufacturers check to see if they cause problems with different hardware configurations. If your PC doesn't get the update, Microsoft isn't entirely confident it will work on your hardware just yet.
However, you can override this and choose to install the update anyway. After all, you can always downgrade back to your current version of Windows 10 if you have any problems, assuming you choose to do so within ten days after upgrading. There's some risk here, but you are still installing a stable operating system update.
To install the update anyway, you can now head to Settings > Update & Security > Windows Update and click the "Check for Updates" button. If a stable version of Windows 10 is available, Windows Update may offer to download and install it—even if it hasn't been rolled out to your PC yet. Look for a "Download and install now" link below a notice about a "Feature Update" being available for your PC.
You can also visit Microsoft's Download Windows 10 page to update. Click the "Update now" button to download the Update Assistant tool, and then run the tool. It will upgrade your PC to the latest version of Windows 10—even if the update wasn't offered to you via Windows Update. The tool may still refuse to install the update if some issues need to be fixed with your PC's configuration first. You can either wait or try to troubleshoot the problem yourself.
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How to Install the Latest Version of Windows 10
Source: https://www.howtogeek.com/343979/what-is-the-latest-version-of-windows-10/