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 the or AMD Software app for the latest updates. A "Clean Install" of drivers often resolves deeper handshake issues between the OS and the game.
Open the game’s or Options menu (the small window that pops up before the game actually starts). Look for the Display or Graphics tab. Uncheck the box labeled Exclusive Fullscreen . unable to open bigfile bigfile000 exclusive
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
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
An outdated GPU driver can struggle to hand over "exclusive" control to the game engine, leading to a handshake failure.
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 A "Clean Install" of drivers often resolves deeper
Wait for the process to finish; it will automatically redownload any corrupted parts of the bigfile. 4. Check for Background Interference
The most common culprit for this specific error is the "Exclusive Fullscreen" setting in the game's launch options. While this mode is designed to give the game priority over system resources, it often clashes with modern Windows display drivers or background overlays.