During the installation of the game, or when trying to run XCOM 2 appears extract.Dll error
Extract.Dll at startup in XCOM 2 there because lack components for your operating system Windows.
To solve this problem you need to install the Feature Pack winsdk_web, after installing rerun the XCOM 2 and extract. Dll error will disappear.
Win SDK he scans your operating system and update all missing components.