Close the app > Press Win+R > Type %localappdata% > Delete the EpicGamesLauncher folder. Advanced Solutions Check for Disk Errors
Most instances of this error are caused by a single corrupted "bigfile" during an update or installation. Rise Of The Tomb Raider Unable To Open Bigfile.000
Download the latest (x64) from the official Microsoft website. Install and restart your PC. Hardware Considerations Close the app > Press Win+R > Type
If verification fails to fix the loop, you may need to force a redownload of the specific corrupted asset. Navigate to your game installation folder. Locate bigfile.000.tiger . Delete this specific file. Run the tool again. The launcher will now download a clean version of the file. 3. Clear Download Cache Install and restart your PC
The "Unable to Open" prompt can signify a failing sector on your Hard Drive or SSD. Open as Administrator.
💡 In rare cases, faulty memory can corrupt data as it is being read into the system. If you experience this error alongside frequent blue screens (BSOD), run a Windows Memory Diagnostic to rule out hardware failure.