Some custom builds disable Windows Update by default. You may need to manually enable it or download security patches yourself.
What are you installing this on? (PC, Laptop, or Steam Deck?) AnkhTech.OS.Pack.Multilingual.v2.iso
Unlike many "Lite" Windows mods that strip away language files to save space, this ISO allows users to install their preferred language packs during or after setup. Some custom builds disable Windows Update by default