The "Unarc.dll returned an error code 1" error typically occurs during the installation of large software or games (often repacks) when the system fails to decompress the archive data . This is usually caused by corrupted installer files antivirus interference insufficient system resources like RAM and virtual memory. Google Groups 1. Clear Temporary Files
Permission issues can prevent unarc.dll from writing temporary files. Running the setup with elevated rights often resolves this.
To fix the error, the most effective solutions involve increasing your system's virtual memory , clearing temporary files , and ensuring your antivirus isn't blocking the installation. This error typically occurs when a game or software installer fails to decompress data due to insufficient resources or corrupted files. Top Solutions to Fix the Error
If your Windows user folder contains symbols, spaces, or non-English letters (e.g., C:\Users\Siniša\ ), the decompressor fails. how to fix unarc dll returned an error code 1
Uncheck .
Check that box and proceed with the installation. This stabilizes data stream transfers to your memory, preventing extraction crashes. 4. Adjust the Windows Virtual Memory (Pagefile)
Select your system drive (usually C:), click , and set the values based on your RAM: The "Unarc
Note: If you use a third-party antivirus (like Avast, Malwarebytes, or Bitdefender), right-click its icon in your taskbar tray and disable it temporarily. Step 4: Run SFC and DISM Scans
Windows uses a temporary folder to hold extracted data. If this folder is corrupted, full, or located on a failing drive, the process fails with error code 1.
Select under the "Virus & threat protection settings" heading. Toggle Real-time protection to Off . Clear Temporary Files Permission issues can prevent unarc
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minimizes background processes and RAM usage, which often bypasses decompression errors.
Share it with a friend who keeps getting installation errors. For more troubleshooting guides, check out our archive of DLL error fixes.
Ensure that you have administrative privileges to install the program. Right-click on the installation file and select "Run as administrator" to install the program.
Attempt the installation again. Remember to turn your protection back on after the installation is complete. 3. Clear Temporary Files