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Did you recently or change any in-game DirectX settings before this error started appearing?
Disable overlays and background applications that might be interfering with the game: Borderlands 3 Low Level Fatal Error Line 4240 --BEST
Many forum posts claim this error is a "sign your GPU is dying." That is rarely true. In 2026, the consensus among technical players is that are the root cause. Did you recently or change any in-game DirectX
Reinstall the Visual C++ Redistributable package, as it might be corrupted or outdated: Reinstall the Visual C++ Redistributable package, as it
The in Borderlands 3 (often linked to various line numbers like 4240) is typically caused by a conflict with DirectX 12 or corrupted configuration files . Primary Fix: Switch to DirectX 11
If you have an older GPU (GTX 1000 series or RX 500 series), DX11 is mandatory. If you have an RTX 3000/4000 series, you can try DX12 after all other fixes, but Line 4240 will likely return.