Only download from reputable historical societies, libraries, or official corporate archives.
Downloading compressed files from unverified sources is a common way for malware to spread. Because the contents of a .rar file are hidden until extracted, they are frequently used to disguise:
If you’ve stumbled across a link to while browsing for historical archives or technical manuals, you might be tempted to click. The name Krupp carries immense weight, famously associated with the legendary German steel and munitions empire that shaped modern history.
The Mystery of "Krupp.rar": Why You Should Think Twice Before Downloading