The most reliable way to get the viewer is directly from the Cadence website. Avoid third-party mirror sites to ensure you are getting a secure, malware-free installer. Cadence PCB Viewer Download Center
The viewer is more than just a "read-only" tool; it provides deep insight into the PCB design: allegro free physical viewer 174 download link
Right-click the installer and select "Run as Administrator." The most reliable way to get the viewer
Yes. Since OrCAD and Allegro share the same file format (.brd), this viewer works perfectly for OrCAD PCB designs as well. If you have trouble with the installation, let me know: Are you getting a specific error code ? allegro free physical viewer 174 download link
You will likely need to provide an email address to receive the download link or access the installer. Why Use Version 17.4?