You'll need a program capable of extracting .rar files, such as WinRAR, 7-Zip, or another archive utility.
If you are trying to handle this file on your computer, I can provide a regarding multi-part RAR archives, how to reconstruct them, and standard troubleshooting. This information applies universally to any file with a .part10.rar extension. FC2PPV-3620789-2-4K.part10.rar
To use it, you must: