Even the official installer will fail on modern Windows 10/11 (builds 1909+ and 21H2+) due to obsolete prerequisites (.NET 3.5, MSXML 6.0, Visual C++ 2010 redist). Here’s the proven “fix” sequence:
Enable-WindowsOptionalFeature -Online -FeatureName NetFx3 Tia Portal V12 Sp1 Download Fixed
: The most reliable way to get the installation media is to Create a Support Request with Siemens. If you have a valid license, they can often provide a secure link to the older files. Even the official installer will fail on modern
We are pleased to announce that .
Siemens' TIA Portal V12 SP1 is a legacy but still-used automation engineering environment. Recently reported download problems have been resolved; this post explains the cause, how to obtain the fixed installer, and what to do if you still have issues. We are pleased to announce that
Instead of spending hours searching forums for why the download gives a "Simatic WinCC RT Professional" error or why the installer hangs at 90%, this feature automates the troubleshooting. It turns a risky "Fixed Download" into a stable engineering environment.