Before opening, scan the file with trusted software (e.g., Windows Defender, Malwarebytes).
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.
Do not run unknown executable files with administrative privileges.
Because this is a specific, likely third-party file and not a recognized official software product, 1.