Software
Download Prizm
The signed installer for Prizm, the engineering toolkit for Siemens TIA Portal. Download and run it to install — copies already installed update themselves automatically from this service.
Download for WindowsInstalling for the first time
Windows shows a caution for software it has not seen many times before. Prizm is new, so you will most likely see it. Here is what to expect.
- Your browser may say the file is not commonly downloaded. Choose Keep to continue.
- When you run it, Windows may show “Windows protected your PC”. Select More info, then Run anyway.
- Before you do, check the publisher line reads PRIZM TECHNICAL SERVICES LTD. That is the digital signature confirming the file genuinely came from us and has not been altered. If it says anything else, stop and email support@prizm-technical.co.uk.
- Prizm installs for your user account only. It needs no administrator rights, installs no service, and starts only when you launch it.
Why does this happen? Windows SmartScreen rates software by how widely it has been downloaded, not by whether it is signed. Every new release starts with no history, so the caution appears until it has been installed enough times. The installer is digitally signed throughout, and you can confirm the exact file independently using the SHA‑256 checksum.