If you need an old-school Office suite that works and runs from a USB drive, here are safer and legal options:
Finding an official "portable" version is impossible because Microsoft never released one. However, the standard Spanish version can still be found through preservation sites: descargar office 2003 portable espa%C3%B1ol
La distribución de estas versiones modificadas viola los términos de licencia de Microsoft, convirtiéndolo en software ilegal (piratería). If you need an old-school Office suite that