Download and install the latest Microsoft Visual C++ Redistributable (X64). Update your DirectX using the Microsoft Web Installer.
Run the Installer in Compatibility ModePermissions can sometimes trigger Unarc.dll issues. Right-click the Setup.exe file. Select Properties > Compatibility. Check Run this program in compatibility mode for Windows 7. Check Run this program as an administrator. Apply and try the installation again. unarc dll error code 12 download 64bit fixed
Set Initial size to 4096 MB and Maximum size to 8192 MB (or higher if you have the space). Click Set, then OK, and restart your PC. Download and install the latest Microsoft Visual C++
Update DirectX and Visual C++ RedistributablesMissing system libraries can lead to decompression failures. Ensure your system has the latest 64-bit packages: unarc dll error code 12 download 64bit fixed