You must have every preceding part in the series (SignalComplete.7z.001, .002, etc.) in the same directory .
You need an archive manager that supports multi-part 7z files. 7-Zip (Recommended for Windows) — Download from 7-zip.org SignalComplete.7z.007
This usually means part .008 (or higher) is missing, or one of the files was corrupted during download. You must have every preceding part in the
Make sure you are right-clicking the .001 file. If you try to open .007 directly, most software will fail because it doesn't see the "header" information located in the first part. SignalComplete.7z.007
Right-click .001 → 7-Zip → Extract Here (or Extract to "SignalComplete/" ).