Encountering the "unarc.dll returned an error code -11" (or just "error code 11") message on Windows 11 is frustrating, especially when you are trying to install a game or a large software archive. This error typically occurs during the extraction process using Setup Factory or Inno Setup installers.
Steps:
Note: Use higher values (e.g., 16 GB max) if you have less than 8 GB of physical RAM. unarc.dll returned an error code 11 windows 11
Avoid special symbols (like #, @, !) or non-English letters in your folder names. Bad Path: C:\Games\Action#Game! Good Path: C:\Games\ActionGame 3. Adjust Processor Settings Fix: "unarc
Steps to fix unarc.dll error and error code - 11 : r/CrackSupport unarc.dll returned an error code 11 windows 11