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Crysis 3 error unarc.dll: How to fix it

Crysis 3 is a first-person shooter game developed by Crytek and published by Electronic Arts in 2013. It is the third and final installment of the Crysis series, which follows the adventures of Prophet, a nanosuit-wearing soldier who fights against alien invaders and corrupt corporations. Crysis 3 is praised for its stunning graphics, immersive gameplay, and varied environments. However, some players may encounter a common error when trying to install or run the game on their Windows PC. This error is related to the unarc.dll file, which is a dynamic link library that is used by some programs to decompress archive files. The error message may look something like this:


Unarc.dll returned an error code: -1 ERROR: archive data corrupted (decompression fails)

This error can be caused by various factors, such as corrupted or missing unarc.dll file, outdated or incompatible graphics drivers, insufficient disk space or RAM, malware infection, or registry issues. In this article, we will show you how to fix the Crysis 3 error unarc.dll with four possible solutions.

Solution 1: Reinstall the game

One of the simplest ways to fix the Crysis 3 error unarc.dll is to reinstall the game. This can help you replace any corrupted or missing files that may be causing the error. To reinstall the game, follow these steps:

  • Go to Control Panel > Programs and Features and find Crysis 3 in the list of installed programs.

  • Right-click on Crysis 3 and select Uninstall. Follow the on-screen instructions to complete the uninstallation process.

  • Restart your PC and insert the game disc or download the game from the official website or a trusted source.

  • Run the setup file and follow the on-screen instructions to install the game again.

  • Launch the game and check if the error is resolved.

Solution 2: Update your graphics drivers

Another possible cause of the Crysis 3 error unarc.dll is outdated or incompatible graphics drivers. Graphics drivers are essential for your PC to communicate with your graphics card and display the game properly. If your graphics drivers are not up to date or compatible with your system, you may encounter various errors or performance issues when playing games. To update your graphics drivers, follow these steps:

  • Press Windows key + R to open the Run dialog box.

  • Type devmgmt.msc and click OK to open Device Manager.

  • Expand Display adapters and right-click on your graphics card.

  • Select Update driver from the context menu.

  • Select Search automatically for updated driver software and wait for Windows to find and install the latest driver for your device.

  • Restart your PC and launch the game to see if the error is fixed.

You can also use a third-party tool like [Driver Easy] or [Driver Booster] to automatically scan, download, and install the best drivers for your PC.

Solution 3: Reregister the unarc.dll file

Sometimes, the unarc.dll file may not be registered properly in your system, which can lead to errors when trying to use it. To reregister the unarc.dll file, follow these steps:

  • Locate the current unarc.dll file on your PC and rename it as unarc.bak.dll. You can find it in one of these folders:

  • C:\\Windows\\System32 (for 32-bit operating systems)

  • C:\\Windows\\SysWOW64 (for 64-bit operating systems)

  • Copy the unarc.dll file from another normal PC or download it from a reliable source like [] and save it to your desktop.

  • Move the new unarc.dll file to the same folder where you renamed the old one.

  • Open PowerShell as administrator by pressing Windows key + X and selecting Windows PowerShell (Admin).

  • Type the following command depending on your operating system and press Enter:

  • regsvr32 %systemroot%\\System32\\unarc.dll (for 32-bit operating systems)

  • regsvr32 %systemroot%\\SysWOW64\\unarc.dll (for 64-bit operating systems)

  • You should see a message saying that the registration was successful. Restart your PC and run the game to check if the error is gone.

Solution 4: Perform a clean boot

A clean boot is a way of starting your PC with only the essential services and programs running. This can help you troubleshoot and identify any software conflicts that may be causing the Crysis 3 error unarc.dll. To perform a clean boot, follow these steps:

  • Press Windows key + R to open the Run dialog box.

  • Type msconfig and click OK to open System Configuration.

  • Go to the Services tab and check the box next to Hide all Microsoft services.

  • Click Disable all to disable all the non-Microsoft services.

  • Go to the Startup tab and click Open Task Manager.

  • Right-click on each startup item and select Disable to disable them all.

  • Close Task Manager and click OK in System Configuration.

  • Restart your PC and try to install or run the game again.

If the error does not occur in clean boot mode, it means that one of the disabled services or programs is causing the problem. You can enable them one by one and restart your PC each time until you find the culprit. Then, you can uninstall or update the problematic software or contact its developer for support.

Final Words

The Crysis 3 error unarc.dll can be annoying and frustrating for gamers who want to enjoy this amazing game. However, with the solutions we provided in this article, you should be able to fix it easily and quickly. We hope that this article was helpful for you and that you can play Crysis 3 without any errors. If you have any questions or suggestions, feel free to leave a comment below.


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