The Unarc.dll error code 14 is a common problem encountered when installing FitGirl repacks or other highly compressed game installers. This error usually appears during the unpacking process and causes the installation to fail before completion. While the message may look confusing, it typically points to issues related to memory, file integrity, or system stability. This guide explains what the error means and provides step-by-step solutions to fix it.
What Does Unarc.dll Error Code 14 Mean?
Unarc.dll is responsible for extracting compressed archive files during installation
Error code 14 generally indicates that the system ran into problems while decompressing files—most often due to insufficient memory, corrupted archives, or blocked extraction processes
Unlike some DLL errors, this issue is not usually caused by a missing DLL file but by system-level limitations or conflicts during installation
Solution 1: Verify the Integrity of the Repack Files
Corrupted installation files are one of the most common causes of this error
Make sure all parts of the repack were downloaded completely
Check file sizes and names for missing or damaged files
If available, use the installer's built-in verification option
Re-download any damaged parts and avoid pausing downloads
This step alone fixes the issue for many users
Solution 2: Increase Virtual Memory (Paging File)
FitGirl repacks require significant memory during extraction
Press Windows + R, type sysdm.cpl, and press Enter
Go to Advanced → Performance → Settings → Advanced
Click Virtual Memory → Change
Uncheck Automatically manage paging file size
Set Initial size and Maximum size to at least 1.5–2× your RAM
Save changes and restart your PC
Increasing virtual memory significantly reduces decompression failures
Solution 3: Disable Antivirus and Real-Time Protection
Security software often blocks unpacking processes by mistake
Temporarily disable Windows Defender or third-party antivirus
Add the installation folder to the antivirus exclusion list
Disconnect from the internet if needed for safety
Re-enable protection after installation is complete
This prevents critical files from being quarantined during setup
Solution 4: Free Disk Space and Check Drive Health
Low disk space or disk errors can interrupt the extraction process
Ensure you have enough free space (often 2× the final install size)
Run Disk Cleanup to remove temporary files
Open Command Prompt as administrator and run:
chkdsk /f
Restart your PC if prompted
A healthy disk is essential for large installations
Solution 5: Use an Automated System Repair Tool
In some cases, Unarc.dll error code 14 is caused by deeper system issues such as corrupted system files, damaged dependencies, or unstable DLL registrations. When manual fixes do not fully resolve the problem, an automated repair tool can help simplify the process.
Download and install PcGoGo DLL Fixer
Launch the program and click Scan to check for corrupted system files, DLL errors, and dependency issues that may affect the unpacking process
After the scan completes, click Repair Now to automatically fix detected problems
Restart your PC and try installing the FitGirl repack again
This method is especially useful when the error persists despite increasing virtual memory, disabling antivirus software, and verifying installation files
Solution 6: Repair System Files and Dependencies
System corruption can also interfere with unpacking
Open Command Prompt as administrator
Run:
sfc /scannow
After completion, run:
DISM /Online /Cleanup-Image /RestoreHealth
Restart your PC
Also ensure all Microsoft Visual C++ Redistributables are installed
Solution 7: Advanced Troubleshooting (If Nothing Works)
Disable CPU, GPU, or RAM overclocking
Test your RAM for stability
Install the game on a different drive
Extract and install from a non-system drive
These steps address deeper hardware-related issues
Preventive Tips for Future Installations
To avoid Unarc.dll errors in the future:
Keep sufficient free disk space
Avoid running heavy programs during installation
Always download files completely
Keep Windows and drivers updated
Maintain system stability and avoid aggressive overclocking
Primary Reasons Behind the Error
Not enough available RAM or virtual memory
Corrupted or incomplete repack files
Antivirus or Windows Defender blocking the installer
Insufficient free disk space
Disk read/write errors
System instability caused by overclocking
Conclusion
The Unarc.dll error code 14 in FitGirl repacks is frustrating but fixable. In most cases, increasing virtual memory, disabling antivirus software, and ensuring file integrity resolve the issue. By following the solutions in this guide step by step, you can successfully complete the installation and avoid similar problems in the future.
