Siemens Industry Online Support
Siemens AG
Entry type: FAQ Entry ID: 109747789, Entry date: 06/13/2017

Why is the installation of STEP 7 V5.6 or single HSPs aborted?

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If it is not possible to install STEP 7 V5.6 or an HSP, this might be because you have to renew certificates in the operating system.

Siemens signs the SIMATIC software digitally. When the applications are run, certificates are checked for validity. In order to maintain high security standards, the SIMATIC STEP 7 software has a digital signature in the form of certificates. This ensures the trustworthiness and authenticity of the installed components. If it is not possible to install a product or a single HSP, this might be due to the fact that root certificates in the operating system have to be updated.

Make sure that you regularly update the operating system with the updates provided by Microsoft. These updates also include a root certificate update utility.

Further Information
Detailed information about certificates and how to use them is available on the following web sites, for example:

Additional Keywords
Delay, CertUtil, Setup

Security information
In order to protect technical infrastructures, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art IT security concept. Siemens’ products and solutions constitute one element of such a concept. For more information about cyber security, please visit