The primary official source is the (download.schneider-electric.com).

If you cannot find the specific SP12 version in the public download area, contacting Schneider Electric Technical Support is your best bet. If you have the serial number of the HMI panel you are programming, they can often provide access to the specific software version required to maintain that hardware. This ensures you are getting a that is clean, virus-free, and legitimate.

Includes patches to protect HMI projects and runtime environments from potential vulnerabilities.