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

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

By Mitch Bartlett Leave a Comment

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

Option 1 – By Single Site (secure)

  1. In Internet Explorer, click “Tools” (gear) > “Internet Options“.
  2. Select 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.

Option 2 – Multiple Sites (less secure)

  1. In Internet Explorer, click “Tools” (gear) > “Internet Options“.
  2. Select the “Security” tab.
  3. In the “Select a zone to view or change security settings“, select “Internet“.
  4. Select the “Custom level…” button.
  5. Under the”ActiveX and plug-ins” section, change these recommended settings:
    • “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” = “Enable”
    • “Script ActiveX controls marked as safe for scripting” = “Enable”
  6. Click “OK“, then “OK” again.
  7. Restart the browser. The message should no longer appear.

You can also access these settings using the Group Policy Editor under “User Configuration” > “Administrative Templates” > “Windows Components” > “Internet Explorer” > “Internet Control Panel” > “Security Page” > “Internet Zone“.

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Baby and Daddy My name is Mitch Bartlett. I've been working in technology for over 20 years in a wide range of tech jobs from Tech Support to Software Testing. I started this site as a technical guide for myself and it has grown into what I hope is a useful reference for all.

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