If you can provide more context—such as this "soft I.rar" is supposed to be for (e.g., photo editing, game, CAD)—I can give you more specific, safer alternatives.
Download and install WinRAR or the free alternative 7-Zip . Extract: Right-click the soft I.rar file. soft I.rar
Because this is a specific, likely third-party file and not a recognized official software product, 1. If you can provide more context—such as this "soft I