: Once extracted, run a virus scan on the files.
in the filename might refer to a specific content identifier, likely related to video content given the structure. FC2 is a Japanese video sharing website, and PPV might stand for Pay-Per-View. FC2-PPV-4505968.part4.rar
: Point your extraction tool at the first part of the archive (usually the one ending in .rar without a .partX designation). : Once extracted, run a virus scan on the files