How To Fix Unarc.dll Returned An Error Code 14 ✔

How to Fix "unarc.dll Returned an Error Code 14" – The Complete Guide

Encountering the error message "unarc.dll returned an error code 14" is a frustrating experience, primarily because it halts installations—usually during the setup of large video games or software archives. You might be extracting a .rar or .zip file, running a setup.exe, or installing a game from a repack (like FitGirl or Razor1911), and suddenly the process stops with this cryptic error.

Do not panic. This error is almost never a sign of failing hardware or a virus. Instead, it points to a specific set of issues related to memory handling, file corruption, or Windows security settings.

In this 2,500+ word guide, we will dissect exactly what Error Code 14 means, why it happens, and provide 10 proven solutions—from basic checks to advanced system tweaks.

Option C: Limit RAM Usage During Install

• Close all other programs (Chrome, Discord, Spotify).
• Go to Task Manager (Ctrl+Shift+Esc) → Startup → Disable unnecessary items and restart.

When all else fails:

• Try installing on a different PC (if available) to confirm your download isn't corrupted.
• Use a virtual machine (VMware or VirtualBox) with 4GB+ RAM to install, then copy the installed game folder back to your main PC.

Error Code 14 is fixable. It's a software conflict, not a death sentence for your PC. By systematically applying the 10 solutions above—especially the page file tweak and administrator extraction—you will successfully install your game or software.

Need further help? Leave a comment describing exactly when the error appears (e.g., "at 64.2% installation" or "immediately after clicking setup"). That detail can pinpoint the exact fix.

Method 2: Verify the Archive Integrity (Check .bin / .rar Files)

Error code 14 explicitly mentions a "bad block." You need to test if the archive itself is broken.

For WinRAR/7-Zip (single archive):

1. Right-click the .rar or .7z file.
2. Select WinRAR > Test archive.
3. If it says "No errors," the file is fine. If it reports "CRC failed" or "Unexpected end of archive," the file is corrupted.

For Installers with .bin files (FitGirl/DODI):

1. Navigate to the folder containing setup.exe and the .bin files.
2. Look for a file named Verify BIN files before installation.bat or MD5 Checker.
3. Double-click it. It will scan every .bin file.
4. If a .bin fails verification, that specific file is corrupted (usually RAR part 3, 5, etc.).

Solution: Re-download only the corrupted .bin or .rar file, not the whole game.

8. Alternative: Use a different unpacker

• Download the original scene release (not repacked)
• Or install using “setup.exe -lowmemory” (some installers support this flag).

Step-by-step fixes (try in order)

Solution 3: Re-download or Re-hash the File

If the archive is actually corrupted, no settings change will fix it. This often happens with unstable internet connections during download.

1. Re-download the installer: Delete the current setup files and download them from a different source or a different server (if using a torrent, try a different magnet link).
2. Verify Hash (if using torrents): If you used a torrent client, force a re-check of the files to ensure 100% of the data was downloaded correctly.
3. Disk Check: Run a disk check on the drive where the file is located.
   • Open Command Prompt as Administrator.
   • Type chkdsk C: /f (replace C: with your drive letter) and hit Enter.

6. Avoid unpacking on FAT32 drive

Error 14 can appear if you’re installing to a FAT32 drive (max 4GB file size).

• Install to NTFS drive instead.

Method 5: Move the Installer to a Different Drive

Error code 14 can occur if your drive has bad sectors or is too slow (especially 5400 RPM HDDs).

Action plan:

1. Move the setup.exe and all .bin files to:
   • A different partition (D: instead of C:).
   • An SSD if available (SSDs have no bad blocks).
   • A USB 3.0 flash drive (circumvents your internal HDD issues).
2. Run the installer from the new location.