If you need the power of SPSS but want to avoid the risks of unofficial versions, consider these paths:
IBM offers a 30-day trial of the most current, secure version.
While the convenience of a portable app is tempting, "v19.0.0.329 portable" builds found on the web come with significant downsides:
Basic scripting and production job facilities to handle repetitive tasks. Why Do Users Seek a "Portable" Version?