Internet Explorer: “Windows has blocked this software because it can’t verify the publisher” Error

In Internet Explorer, you may have a problem when you try to install an application and receive a Windows has blocked this software because it can’t verify the publisher error message. This can happen on Java and ActiveX controls that load on a webpage.

To try to fix this problem, perform the following steps.

1. In Internet Explorer, click Tools (gear) > Internet Options.

2. Click the Security tab.

3. In the Select a zone to view or change security settings, select Trusted sites.

4. Move the Security level for this zone slider down to Low, then click Apply.

IE trusted sites selection

5. Click the Sites button.

6. Type the URL to the website the software is hosted on in the Add this website to the zone field and click Add. If the website doesn’t have an HTTPS URL, uncheck the Require server verification (https:) for all sites in this zone box, then add it to the box. Click Close when finished.

IE adding trusted site URL

7. Click OK on the Internet Options screen.

8. Close Internet Explorer and try to load the web page again. I’m hoping you have success loading the software this time.


  1. Joe says

    I had the same issue, and nothing seemed to work until I changed my browser to the 32 bit version. Go to start –> all programs and then you will see two versions of Internet Explorer, one is 64 bit the other is not.

  2. Sara says

    1. Open internet explorer, click Tools – Internet Options.

    2. Click the Security tab – Custom Level button.

    under ActiveX and plug-ins:

    Download Signed ActiveX Control – Enable
    Download unsigned ActiveX Control – Prompt
    Initialize and script ActiveX controls not mark as safe – Prompt
    Run ActiveX and plug-ins – Enabled
    Script ActiveX controls marked as safe for scripting – Enabled

    3. Click OK and Apply and OK. Restart the browser.
    You should now be able to run the ActiveX control on the website. As I said earlier, please ensure that you have the above to what it was before.

  3. Henry says

    hi, i have done all that has been said but it still doesn’t seem to work. do you no any way you can help me?

  4. Zeric Zevlin says

    This worked for me in Vist and XP

    Tools > Internet Options > Security tab > Custom Level

    Allow script-iniatiated windows without size or position constraints > Enable

    Download unasigned Active X Controls > Prompt

    Automatic Prompting for Active X Controls > Prompt

    For Vist uncheck Use secure mode

  5. Wind Chimes says

    I’ve tried everything and it still will not let me load an activex control from a site I trust. Please help with any alternative methods I may try. I’m using windows vista.

  6. Darrel says

    I figured this out.

    Don’t do this unless you are absolutely sure this is a Trusted Site

    Add the page (preferably an internal IP address) into your Trusted Sites.
    Tools/Internet Options/Security/Trusted Sites/Sites
    Add the web site. You may have to un-check
    Request server verification (https:)

    Then go back to the Security page, Make sure the Trusted Zone is still selected
    At the bottom in the section
    Security Level for this zone
    Move the Bar to Low

    This will allow you to install the software, but will give you warning prompts.

    After the install you can Restore the Security settings back to Default Level

    I take no responsibility if this screws up your machine.
    I just know it worked for me

  7. nooneinparticular says

    Better yet, set it to Prompt. That way it will ask you before running it, and evil websites can’t just run whatever they want whenever they want unless you allow it.

  8. Andy Han says

    1. In Internet Explorer, Click Tools > Internet Options.

    2. Click the Advanced tab.

    3. Under Active X, set Download Unsigned ActiveX to Enable.

    I try this.
    Infact, it’s in Tools > Internet Options > Security tab > Custom Level.


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