The decompression process might run out of virtual memory, especially with large game installers (50GB+).
The error "Unable to write data to disk" often means your drive is full or cluttered. how to fix unarc dll returned an error code 1
Ultimate Guide: How to Fix "Unarc.dll Returned an Error Code -1" The decompression process might run out of virtual
Enable long path support in Windows 10/11: how to fix unarc dll returned an error code 1
If possible, try installing to a folder that isn't C:\Program Files (x86) , as this folder has stricter security permissions. Step 4: Configure Processor Settings