8 Ways to Fix “IsDone.dll” “Unarc.dll” Errors In Games Installations (100% Working)

These library files: "Isdone.dll" & "unarc.dll" "missing DLL" or "not found" errors have been much striking these days. The Isdone.dll is an active link library file - it has a particular purpose that the system handles it in order to perform multiple tasks. Your PC requires Dynamic Link Library (DLL) files to (or "intending to") making daily tasks, and they apply in a virtual database called 'The Registry'. Recently I was installing the latest game, and after 9% it got stuck, and the error message is shown as an error, and it was "ISDone.dll is missing" unable to read data or "an error occurred while decompressing archive header is corrupted unarc.dll 14" or "unarc.dll error code 12". Then I completely checked all the systems files including system32 folder; the DLL file is missing.
Fix ISDONE.DLL/UNARC.DLL missing error code -1/-7/-11/-12/-14
People used to search; how to solve isdone.dll error while installing games? How to fix Isdone.dll/Unarc.dll returned an error code? How to remove ISDone.dll & unarc.dll file error in PC game? Getting rid of isdone.dll error unarc.dll error-7? Fixing unarc.dll error code: -12 check sum error? Solved the unarc.dll returned an error code 14? What’s QoS? How To Boost & Increase The Internet Speed by QoS | Make Router Faster? Remove archive header is corrupted unarc.dll error code 14? Some might faced isdone.dll/unarc.dll decompression error gta 4 installing game like Mafia, Call Of Duty and all.

Typically such errors occurred when people tend to install "downloaded" games/applications etc. on their own machines "directly." These special DLL files are handled by your PC while playing PC games (usually high-end/high-graphics games), the file used to provide information to the CPU & GPU while playing that game.

Usually, such errors occurred for video game and any other software/application which needed heavy graphics/animations. That is why the "ISDone.dll is missing" error message often arises during the installation of computer games gets failed. However, there is some role of DLL file which stops them from making these moves.

The "Unarc.dll" and/or "Isdone.dll' file errors are very common in nature for Windows 7/8/10 machine users. In most of the cases, these DLL files have been deleted, shifted, damaged by malicious software installed on your machines or sometimes Windows registry changes. The "ISDone.dll" & "Unarc.dll" are the files that, like all the other "dll" files, situated at the System32 folder on 32-bit computer systems whereas in the SysWOW64 folder for 64 bit systems. Here I not only tell you to download isdone.dll or unarc.dll files but also you will get to fix dll missing errors on your computer system.
Fix Isdone Unarc Missing Files
Fix Isdone Unarc Missing Files

What is ISDone.dll error Unarc.dll returned an error code?

Modern games require large amounts of memory for better graphics and speed. Insufficient RAM or hard disk space may prevent the installation of large game files. IsDone.dll errors in Windows 10/11 often occur when installing large programs or games that need to store uncompressed data in RAM or hard drives. This error is often caused by insufficient memory space in the RAM or hard drive of the PC. 

In order to provide better graphics and a faster gaming experience, most games like Call of Duty and Red Dead Redemption now require a lot of memory to run. Therefore, you may not be able to install large game files on your PC because you do not have enough space in your RAM memory or hard drive.

Windows 10 or Windows 11 isDone.dll errors are mostly related to PC games and large program installations. Large games and programs contain compressed data that is uncompressed on your hard drive during installation. This consumes both your PC's RAM and hard drive. During installation, your PC may encounter this error if your PC's RAM or hard drive does not have enough space for the process. 

What is the cause of ISDone dll error?

ISDone.dll errors are usually related to the game or software installation process and can occur for a variety of reasons.

The most common causes of ISDone.dll errors are:
  • Incomplete or corrupted installation files:
    If the installation files are incomplete or corrupt, the installation process can fail and provide an ISDone.dll error.
  • Insufficient disk space:
    If your hard drive does not have enough free space, the installation process may fail and provide an ISDone.dll error.
  • Interference by antivirus software:
    In some cases, antivirus software can interfere with the installation process, causing ISDone.dll errors. This can happen if your antivirus software detects the installation file as a threat and blocks it.
  • Hardware-related issues:
    Faulty RAM or other hardware issues can cause ISDone.dll errors during the installation process.

[Fix] "IsDone.dll"/"Unarc.dll"

Before going further, below points has to be looked at the direct installations of any game or application:
  1. Check system requirements to be required for the application.
  2. Check whether there are any updates/upgrades made in your software/hardware.
  3. Check system type: 32-bit or 64-bit
  4. Have you re-start/re-boot the machine before trying this.
  5. Is your 3rd party antivirus program is installed on your machine?
  6. Understand the step at which this error occurs.
Once all the above is done, we now move forward to look into a couple of methods to resolve this error.

Check out 8 methods to resolve "IsDone.dll" "Unarc.dll" downloading or missing errors when installing games:

Method 1: Run Windows memory diagnostic tool.

  1. Click on the START button.
  2. Go to Control panel.
  3. Open Administrator Tools.
  4. Double click on 'Windows Memory Diagnostic'.
  5. It will prompt to RESTART your machine now or later; but requesting to save any unsaved data/files.
  6. Once your machine is restarted, it will display 'Windows Memory Diagnostic Tool' on a blue screen with some progression.
  7. Try one more time and check whether the issue is being resolved after the machine booted.

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Method 2: Performing a clean boot.

  1. Go to 'RUN' command.
  2. Type 'msconfig' and hit enter.
  3. The 'System Configuration' window will be pop-up.
  4. Navigate to 'Service' tab.
  5. Tick the checkbox named as 'Hide all Microsoft services' displayed at the bottom of the list.
  6. No Click 'Disable All' button displayed at the right side.
  7. Once all the above is done, navigate to 'Startup' tab.
  8. Click on 'Open Task Manager' option.
  9. Right-click on every item displayed under 'Startup' tab and select 'Disabled' option.
    (You may enable them later whenever required)
  10. Close the 'Task Manager.'
  11. Now click 'OK' displayed on 'System Configuration window'
  12. It will prompt to restart the machine.
  13. Restart it now.
  14. Once the machine is booted successfully, try one more time and check whether the issue is being resolved.

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Method 3: Disk clean up.

  1. Click on the START button.
  2. Type 'Disk Cleanup' and hit ENTER.
  3. 'Disk Cleanup' pop-up window will be opened with some progression going on.
  4. Once progress gets completed, it will list down files to be deleted from various areas like; Recycle Bin, Temporary Internet files, etc.
  5. Scroll down and select 'Temporary Windows Installation files' from the list.
  6. And click on 'OK' button.
  7. It will prompt to delete the files permanently, click on 'Delete Files' button.
  8. Once the cleanup is completed, try one more time and check whether the issue is being resolved.
  9. Sometimes, all the unwanted windows installation files won't be deleted.
  10. Hence, to do so, go to command prompt.
  11. Type or paste below commands and hit enter.
    Command 1 - takedown /F C:\$Windows.~WS\* /R /A
    Command 2 - icacls C:\$Windows.~WS\*.* /T /grant administrators: game / applicationF
    Command 3 - rmdir /S /Q C:\$Windows.~WS\
  12. Once all the above is done, try one more time and check whether the issue is being resolved.

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Method 4: User compatibility mode.

  1. Right click on the executable file/application.
  2. Click on 'Properties' option.
  3. Navigate to 'Compatibility' tab.
  4. Select checkbox named; 'Run this program in compatibility mode for' option.
  5. Select 'Windows 7' option from listed items.
  6. Now select checkbox named; 'Run this program as an administrator' at the bottom.
  7. Click on 'Apply' followed by 'OK' button and run the executable file now.

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Method 5: Run Deployment Image Servicing and Management (DISM) tool.

  1. Go to the command prompt.
  2. Type or paste below command and hit enter.
    DISM.exe /Online /Cleanup-image /Restorehealth
  3. This process may take several minutes or hours, so please have patience.
  4. Once this process gets 100% complete, restart the machine.
  5. Now check whether the issue is being resolved.

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Method 6: Improve performance by optimizing the hard drive.

6.1: Improve performance by Repairing bad sectors in hard drive.

  1. Go to the command prompt.
  2. Enter below command and hit Enter.
    chkdsk /f /r
  3. It will prompt you to accept whether this process will be run after machine restart with 'Y' or 'N' options.
  4. Enter 'Y' and hit enter.
  5. Now reboot your machine.
  6. The system will show a message saying "Scanning and Repairing drive (C:): x% completed."
  7. All the system to complete the process.
  8. Now system gets restarted.
  9. Now check whether the issue is being resolved.

6.2: Improve performance by Defragmenting the hard drive.

  1. Click 'Start' and enter 'Defragment' option.
  2. Open system's defragmentation application.
  3. Disk Defragmenter window will be opened.
  4. List of drives will be displayed.
  5. Select 'C' drive and click on 'Analyze' button.
  6. Allow the system to complete the analysis process (status can be viewed under 'Current status' column).
  7. Once this analysis process gets completed, check % fragmented.
  8. If % is more than 10%, select the drive and click on 'Optimize' button.
  9. This process may take some minutes or hours, so please have patience.
  10. Once this process gets 100% complete, restart the machine.
  11. Now check whether the issue is being resolved.

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Method 7: Download and paste new DLL files under System 32 folder.

  1. Download the required *.dll files from internet.
    DOWNLOAD ISDONE.DLL: https://www.dll-files.com/isdone.dll.html
    DOWNLOAD UNARC.DLL: https://www.dll-files.com/unarc.dll.html
    Make sure that, you download the files same as that of your system type (32-bit/64-bit).
  2. Save these files on your machine.
  3. Copy say "Unarc.dll" and/or "Isdone.dll'.
  4. Go to 'My Computer' and access 'C' drive.
  5. Navigate to Windows >> System 32 folder.
  6. Search for above *.dll files under 'System 32' folder.
  7. Rename them and append 'BACKUP' text to those files (e.g. "unarc_BACKUP.dll").
  8. Paste the newly downloaded files under 'Windows >> System 32' folder.
  9. Now paste the files under 'Windows >> SysWOW64' folder if your machine is 64-bit.
  10. Restart the computer.
  11. Once the machine gets restarted, check whether the issue is being resolved.

Update: 15 June

Method 8: Check all the installation files.

In most the cases, if above methods are not working for your PC, you need to RECHECK all the files again. In the torrent application, there is an option to recheck all the files.
  1. Go to torrent app >> select the file >> right click >> choose 'Force Re-Check' >> wait to finish.
  2. There must be some files missing and it will get downloaded again to your PC.
  3. Now try installing that application and you'll see the issue is solved.

Frequently Asked Questions

Please take a moment to read through our FAQ section for quick answers to common questions.

What is Unarc DLL Error Code 11?

Unarc DLL Error Code 11 is an error message that appears during the installation of a game or software. It indicates that there was a problem decompressing or extracting files from the installation archive. This error is typically associated with issues related to insufficient disk space, corrupted or damaged installation files, or conflicting antivirus software.

How do I fix Unarc dll error while installing games?

To fix Unarc dll error while installing games, you can try these solutions:
  1. Ensure that you have enough free disk space to accommodate the installation.
  2. Verify the integrity of the installation files or redownload them if they are corrupted or incomplete.
  3. Temporarily disable your antivirus software during the installation process.
  4. Run the installation as an administrator by right-clicking the installer and selecting "Run as administrator."
  5. Use a tool like DLL fixers to repair or replace the problematic DLL files.

What is the cause of ISDone dll error?

ISDone.dll errors commonly occur during the installation of games or software and are often caused by issues related to incomplete or corrupted installation files, insufficient disk space, antivirus software interference, or hardware-related problems like faulty RAM.

Where is Isdone DLL located?

The Isdone.dll file is typically located in the system's Windows/System32 or SysWOW64 folder, depending on whether it is a 32-bit or 64-bit operating system. The exact location may vary depending on the specific system configuration.

How to install ISDone dll in Windows?

To install ISDone.dll in Windows 10, follow these steps:
  1. Download the ISDone.dll file from a trusted source.
  2. Copy the downloaded file to the appropriate system folder (Windows/System32 for 32-bit or Windows/SysWOW64 for 64-bit).
  3. Register the DLL by opening the Command Prompt as an administrator and typing the command "regsvr32 isdone.dll" followed by Enter.

Can I delete DLL files?

Deleting DLL files is generally not recommended unless you are sure that the file is no longer needed and is not associated with any installed software or system functionality. DLL files are essential for the functioning of programs, and deleting them can result in errors or malfunctions. If you suspect a DLL file is causing issues, it is advisable to seek assistance from a professional or perform a system restore.

How do I fix DLL error when installing software?

To fix DLL errors when installing software, you can try the following steps:
  1. Ensure that you have downloaded the correct and complete installation files from a trusted source.
  2. Disable your antivirus software temporarily during the installation process.
  3. Run the installer as an administrator by right-clicking the installer and selecting "Run as administrator."
  4. Update your system drivers to the latest versions.
  5. Perform a malware scan to check for any malicious software interfering with the installation process.
  6. Contact the software developer's support for further assistance if the issue persists.

How do I register DLL files?

Open the Command Prompt as an administrator. Type the command regsvr32 path_to_dll_file and press Enter. Replace path_to_dll_file with the full path of the DLL file you want to register. You should see a confirmation message indicating that the registration was successful. Note that not all DLL files can be registered, as it depends on their purpose and functionality.
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