Run the installer in compatibility mode for an earlier version of Windows: right-click the setup.exe file, open Properties, and click the Compatibility tab.Make sure your Windows swap file is not disabled.Unarc.dll returned an error code“The problem is to change the folder names and paths to the installation file and the installation folder only in English, without spaces, and it is desirable that the name be short.
So the first step is to try and fix the error “ An error occurred while unpacking. If the path is too long, this can also cause an unarc.dll error. Fix this by removing such characters from the installer file path and installation location. If the path contains non-english characters, this may cause an unarc.dll error. The most common cause of unarc.dll crashes when installing such applications is a file path issue: both to the installer files and to the folder where the game is installed. The unarc.dll error usually appears when installing “repacks” packaged with Inno Setup and other methods. Installer files and installation folder paths The following step-by-step instructions provide working ways to fix unarc.dll errors when installing games on Windows. However, these steps usually do not solve the problem under discussion – it is not related to the absence of files in the system. Most of the instructions for fixing this error that can be found on the Internet suggest downloading the unarc.dll and isdone.dll files, copying them to the System32 or SysWOW64 folders, and then calling regsvr32.exe.
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