How to overcome the warning message "The signature of the file is corrupt or invalid"

√úbersicht: 

This article describes how to overcome the warning message which you might receive when you download the Trader Workstation or IB Gateway installation packages.

Background: 

Since a Microsoft update has modified the signature validation mechanisms, the Trader Workstation and IB Gateway installation packages might be reported as having an invalid or corrupt signature, although their signature is indeed intact and absolutely valid.

If you are using Microsoft Edge as browser please follow all the steps below. If you are using any other browser start directly from point 3.

 

1. As soon as the installation package has been completely downloaded, you will notice on the bar at the bottom of your browser frame the warning message "The signature of the file tws-... is corrupt or invalid". Please click on the button View Downloads to open the DOWNLOADS panel. 

 

2. Right click on the filename and select Run anyway.

 

 

3. Once the installer has been launched, the SmartScreen filter will display an additional warning message. Click on the link More Info.

 

4. Now click the button Run Anyway to allow the file execution. The installation will then start.