How to Fix Unarc.dll Returned Error Code in Windows 11/10 [Solution]

DLL files are particularly common in Windows because they are shared library files used by multiple applications and loaded only when needed. If you open the directory of Windows or any other installed application, you will see dozens or even hundreds of files using the DLL extension.

Unarc.dll is one of the dynamic link library files used by various applications to decompress compressed files using certain algorithms. When this file is missing or corrupted, you may see errors such as "Unarc.dll returned an error code." This error can occur when trying to install a new program, update an existing program, or extract files from a compressed archive.

Check your disk space:
1. Type Disk Cleanup in Windows Search and press Enter
If your Windows is installed on C drive, select it from the list (should be by default) and press OK
2. Click Clean up system files
3. Select your primary disk again and click OK
4. Here, select the largest parts of the data used, including Temporary Internet Files, Windows Update, Temporary Files, Recycle Bin, Delivery Optimization Files and others.
5. Click OK and wait for the cleaning process to complete.

Issues covered in this tutorial:
an error occurred while unpacking unarc.dll returned an error code
unarc.dll returned an error code, archive data corrupted
unarc dll returned error code 11, archive data corrupted
corrupted unarc.dll archive returned error code 7
corrupted unarc.dll archive returned an error code
unarc.dll returned an error code
unarc.dll returned an error code 11
unarc.dll fix returned error code in Windows 11

Unarc.dll is a dynamic library for Windows that can be used correctly with some specific programs. So, if unarc.dll is missing, the program cannot work normally and you may encounter the error of unarc.dll missing or the problem of unarc.dll returned an error code.

There are several potential causes for this error, including problems with the Microsoft Visual C Redistributable Package, the presence of malware on your system, an incomplete or corrupt download, or a problem with the unarc.dll file itself.

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