Hi,
If you are using Windows 11 25H2 and it's fully up to date, your system will automatically receive the 26H2 update via Windows Update. The advantage of using Windows Update is that it can upgrade to 26H2 with a tiny Enablement Package, saving you time.
To be among the first to receive the update, go to Settings > Windows Update and turn on Get the latest updates as soon as they’re available. Once your device is eligible, you’ll see the option to download and install Windows 11, version 26H2.
Please see How to get the Windows 11 2026 Update | Windows Experience Blog
Note: The above link is in English. As translation services are unavailable for the above link(s), please manually translate them into your native language using Bing Translate.
After installation, do I need to uninstall the motherboard and graphics card drivers?
You don't have to uninstall any drivers after installing 26H2.
Additional Information
If you still need the Windows 11 26H2 ISO, you can download it from the following Microsoft site.