Isus.rar »

"ISUS" sometimes refers to "InstallShield Update Service."

did you find "isus.rar" (e.g., inside a software folder, email attachment)? isus.rar

If this file was unexpected, downloaded from an untrusted source, or arrived via email, it is highly recommended to scan it with an antivirus program before opening it. "ISUS" sometimes refers to "InstallShield Update Service

Here is what I can tell you about managing a .rar file like "isus.rar": inside a software folder

You will need archive software like WinRAR or 7-Zip to look at the contents of a .rar file.

To give you the exact "feature" or information you need, could you tell me:

are you trying to do with it? (e.g., scan it for safety, extract its contents, know what it belongs to)?