You can request the installer by filling out a form on the official Cadence Software Downloads page
The legitimate download link for Allegro Free Physical Viewer 17.4 is not a direct URL that can be posted in a forum (it changes with each software update and requires login). Your actionable steps are: allegro free physical viewer 174 download link
Here is the useful content and guidance regarding the for version 17.4. You can request the installer by filling out
Cadence Design Systems, Inc. is the current owner of the Allegro PCB Design platform. This article is for informational purposes. Software versions (e.g., 17.4) are often updated with Hotfixes (e.g., S033). Always download from official sources to avoid malware. allegro free physical viewer 174 download link