Entry type: FAQ, Entry ID: 59902882, Entry date: 01/08/2015

How can you disable the Protected Mode of the Internet Explorer when using the WinCC WebNavigator?

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The "Protected Mode" of the Microsoft Internet Explorer is a feature that reduces the ability of malicious software being installed on your computer. The "Protected Mode" also affects the execution and display of ActiveX control elements used by the WinCC WebNavigator. The "Protected Mode" must therefore be disabled for the trusted sites, otherwise you get this error message displayed: "Low integrity level not supported - please disable Protected Mode".

Below is the procedure for disabling the "Protected Mode" of the Internet Explorer for trusted sites.

No. Procedure
1 Start the Internet Explorer and open the settings of the Microsoft Internet Explorers by way of "Tools > Internet options".
2 Switch to the "Security" tab.
3 Mark the "Trusted sites" zone and disable the option "Enable Protected Mode (requires restarting the Internet Explorer)".

Fig. 01: Security settings of the Internet Explorer

4 Apply the settings and restart the Internet Explorer.
Table 01

Creation environment
The screens in this FAQ response were created with Windows 7 Ultimate.

Security Notes
Siemens offers products and solutions with industrial security functions which support the secure operation of plants, solutions, machines, devices and/or networks. They are important components in a comprehensive industrial security concept. The Siemens products and solutions continue to be developed under this aspect. Siemens recommends that you keep yourself regularly informed about product updates.
For the safe operation of Siemens products and solutions it is necessary to take appropriate security measures (cell protection concept, for example) and to integrate each component in an overall industrial security concept which is state of the art. This should also cover the third-party products used. Additional information about industrial security is available at:
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Additional Keywords
Protected Mode