Once extracted, scan the resulting folder with Microsoft Defender or Malwarebytes .
Do you have downloaded, or are you seeing a specific error message when you try to open this one? OFSTERENR-MW.part3.rar
RAR files split into parts (like .part1.rar , .part2.rar , etc.) are like pieces of a single puzzle. Once extracted, scan the resulting folder with Microsoft
If your extraction stops and asks for the "next volume," it means Part 4 is missing from your folder. the extraction will fail.
You must have all parts in the same folder before you begin. If one is missing or corrupted, the extraction will fail.