https://store.rg-adguard.net is not an official Microsoft website. Instead, it's a community-driven that allows users to retrieve direct download links for Microsoft products — including Windows ISOs, cumulative updates, .NET Framework packages, and Microsoft Store app packages ( *.appx , *.msix , *.eappx ).

It looks like you're referencing a URL structure similar to https://store.rg-adguard.net/ , which is a well-known third-party (often used for downloading genuine Windows, Office, and other Microsoft product installers directly from Microsoft's servers via generated links).

Based on that, here is a short informational piece: