Always verify the digital signature on the downloaded file. Siemens packages are digitally signed by "Siemens AG"—if that signature is missing or invalid, delete the file immediately.
The safe source is Siemens Industry Online Support (SIOS) . siemens primary setup tool 4.2 download
Streamlining Your Drive Engineering: A Guide to the Siemens Primary Setup Tool (PST) 4.2 Always verify the digital signature on the downloaded file