Removing "unnecessary" components like Windows Update, Defender, or even the print spooler leads to an unstable system. You may not discover a missing DLL until you try to install a driver or run a specific app.
You can mount an official ISO, then use DISM to remove language packs, in-box apps, or even index components. Example: highly compressed windows 10 iso file download
This article dives deep into the technical reality of Windows 10 compression, the methods used to shrink ISOs, the risks of third-party "highly compressed" versions, and the safest paths to obtaining a legitimate, small-footprint Windows 10 installation medium. Example: This article dives deep into the technical
Some distributors download the official Microsoft ISO, then re-pack it using 7-Zip’s highest compression settings (e.g., LZMA2, 256MB dictionary, solid block). The result is a that can be extracted to yield the original ISO. If you have already downloaded a Windows 10
If you have already downloaded a Windows 10 ISO file and want to compress it further, you can use tools like: