Files with these types of names found outside of official sources (like Steam or Epic Games) often pose risks:
If this is a pirated game or software, it may contain viruses. Always scan the extracted files with reputable antivirus software like Windows Defender or Malwarebytes .
When a file is too large, it is split into smaller parts (.part1, .part2, .part3, .part4, etc.) to make downloading easier [1].
To extract the content, you need (part1, part2, etc.) in the same folder.
Ensure you have WULNOT-MW.part1.rar , WULNOT-MW.part2.rar , etc.
If you don't see ".rar", ensure your Windows settings show file extensions to avoid confusing .rar files with other file types. To give you more specific instructions, could you tell me: Where did you download this file from? Are you trying to install a game ? Do you have part 1, 2, and 3 downloaded as well?
Use software like WinRAR (standard), 7-Zip (free), or The Unarchiver (Mac).
This means the file is corrupted. Redownload the specific part that is corrupted.