An outdated GPU driver can struggle to hand over "exclusive" control to the game engine, leading to a handshake failure.
Wait for the process to finish; it will automatically redownload any corrupted parts of the bigfile. 4. Check for Background Interference
Try launching the game in standard "Fullscreen" or "Windowed" mode. 2. Run as Administrator unable to open bigfile bigfile000 exclusive
Sometimes the system prevents the game from gaining "exclusive" access to its own files because of Windows User Account Control (UAC) restrictions. Navigate to the folder where the game is installed. Right-click the game’s .exe file (e.g., TombRaider.exe ). Select Properties > Compatibility tab. Check the box Run this program as an administrator . Click Apply and restart the game. 3. Verify Game File Integrity
Here is a step-by-step guide to fixing the issue and getting back into your game. 1. Disable Exclusive Fullscreen An outdated GPU driver can struggle to hand
Since the error mentions "exclusive" access, it’s possible another program is already "hooked" into the file or the display.
In 90% of cases, in the game's launcher settings fixes this error instantly. If that fails, administrative privileges and file verification are your next best bets. Check for Background Interference Try launching the game
Troubleshooting the "Unable to Open Bigfile BIGFILE000 Exclusive" Error
Disable overlays from Discord, Steam, or NVIDIA GeForce Experience, as these sometimes interfere with how a game takes control of the screen. 5. Update Graphics Drivers