Because this version is old, standard Windows Update may not provide the latest security patches. Users sometimes manually install Cumulative Updates (CUs) or Service Stack Updates (SSUs) from the Microsoft Update Catalog to keep it stable.
Modded versions like "Altum Pro" are not official Microsoft releases. They may contain pre-configured settings that disable critical security features (like Windows Defender or Windows Update) to achieve higher performance. Installation and Updates windows 10 altum pro 1607 x64 full version updated
Custom builds frequently block feature updates to avoid breaking their modifications. You will be stuck on an outdated, insecure version of Windows 10. Because this version is old, standard Windows Update