Set both the and Maximum size to a high value like 16384 MB (16GB). Verification and File Integrity
Avoid installing the game in deep subfolders. Install it directly to a root folder like C:\Games\The Sims 4 .
Jordan nodded knowingly. “Error code 11 in unarc.dll means the archive failed during decompression — specifically, data corruption OR a mismatch in compression method. It’s not the game’s fault. The installer can’t unpack the files because something is broken or unsupported.” unarc.dll returned an error code 11 sims 4
Select your C: drive, choose , and set the Initial and Maximum size to at least 8192 MB (8GB) or 16384 MB (16GB). Click Set , then OK , and restart your PC. 3. Run the Installer as Administrator
By following these steps, you should be able to troubleshoot and potentially resolve the "unarc.dll returned an error code 11" error in Sims 4. Set both the and Maximum size to a
Many modern repack installers include a checkbox at the very beginning that says Checking this box can prevent the decompression process from overloading your system, which often solves error 11 even if it makes the installation take longer. 3. Disable Antivirus and Windows Defender
If all else fails, bypass the broken installer entirely. You can manually extract the game files. Jordan nodded knowingly
Lack of storage space, file system errors, or bad sectors on your HDD/SSD.
(often from repacks like FitGirl or DODI). It indicates a failure to unpack or write data to your disk, often due to memory, storage, or permission issues .
In simple terms, error code -11 means the installer is having trouble extracting the game files to your hard drive. What Causes Unarc.dll Error -11?
Close web browsers (Chrome/Edge are memory-hungry), streaming apps, and other heavy programs before installing.