Unofficial "fix" files are common vectors for viruses.
ERROR: Could not find zone "en_core_pre_gfx" : r/blackops3 Zone En-core-pre-gfx File Download
The game is trying to load English assets while set to a different language, or vice-versa. Unofficial "fix" files are common vectors for viruses
Instead of searching for a manual "Zone En-core-pre-gfx File Download" from untrusted third-party sites—which can carry security risks—the safest way to acquire the file is through official game verification or language pack updates. Common Causes for the Error Zone En-core-pre-gfx File Download