You must already own the official Ultimate HD Edition (2014) on Steam to install it.
Purchasing the game ensures you have a stable, safe version that is compatible with the latest fan mods and fixes. How to Install ReShade + HD Project for Resident Evil 4 resident-evil-4-hd-ultra-edition-free-download
Websites offering "free downloads" for the full base game (often labeled as "repacks" or "direct downloads") are usually distributing pirated copies. You must already own the official Ultimate HD
Files from unofficial sources may contain malware or unwanted software. resident-evil-4-hd-ultra-edition-free-download