Hi @Petr Binko
I think WebView2 Evergreen Runtime will update automatically on Windows LTSC.
From this doc, we can see that
The WebView2 Runtime updates automatically without more effort from you.
Windows LTSC can delay receive Windows feature updates, but WebView2 Evergreen Runtime is not updated with Windows updates. It will update by itself automatically.
If you don't want the WebView2 Runtime update, you can refer to this doc to use the Fixed Version of the WebView2 Runtime.
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Regards,
Yu Zhou