Occasionally, an aggressive antivirus update might flag a newly updated bigfile000 as a "suspiciously large modified file." Temporarily disable your Real-Time Protection. Try to launch the game.
If it works, add the game folder to your antivirus . unable to open bigfile bigfile000 updated
Go to your game’s installation folder (usually SteamLibrary\steamapps\common\GameName ). Right-click the main folder and select . At the bottom, uncheck Read-only . Occasionally, an aggressive antivirus update might flag a
Uncheck or "DirectX 12" to see if it bypasses the file check error. unable to open bigfile bigfile000 updated