In the vast majority of cases, the solution is to properly reinstall unarc.dll on your PC, to the Windows system folder. Alternatively, some programs, notably PC games, require that the DLL file is placed in the game/application installation folder.
IsArcExtract error is generally associated with the DLL (Dynamic Link Library) file ISDone.dll which is responsible for the extraction of large archive files for games and sometimes, Softwares. This error occurs mostly during the installation of a game on Windows, the system fails to extract a large archive that contains data files of the game. This ultimately results in an unsuccessful installation. 2b1af7f3a8