Windows has blocked this software because it cannot verify the publisher”

Original Title: Trying to install active X control

I need to install active x control to enable me to use a college website. Everytime I try to install this it asks me 'if I want to allow the following programme to make changes to this computer' I say yes, then it says 'windows has blocked this software because it cant verify the publisher'.

What do I need to do to allow the computer to install this control?


Hi Laura____Lou,


By default Internet Explorer disable running unsigned ActiveX controls. Unsigned activeX controls are programs that try to execute a command on your PC, like CAB install files or a ZIP file which do not have a digital signature.


While this is an important security measure on the Internet Explorer browser, if you are sure that the website is a trusted one then you can temporarily disable this security feature to get the website run the required ActiveX and later on re-enable the security.


To disable this feature:


    a.    Open internet explorer.


   b.    Click Tools – Internet Options.


   c.    Click the Security tab – Custom Level button.


   d.    Under ActiveX ensure the following are set to  enabled


o   Run ActiveX and plug-ins – Enabled

o   Download Signed ActiveX Control – Enabled

o   Script ActiveX controls marked as safe for scripting – Enabled


   e.    Set the following to “Prompt


o   Download unsigned ActiveX Control – Prompt

o   Initialize and script ActiveX controls not mark as safe – Prompt


      See Screenshot below.






f.    Click OK and Apply and OK.


g.    Restart the browser.



You should now be able to install the ActiveX control.


Note: Please ensure that you enable this feature back once you run the ActiveX control by reverting all the changes done above.


Shinmila H - Microsoft Support

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Question Info

Last updated February 6, 2021 Views 146,497 Applies to:

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