When I  tried to open my CCTV Camera-DVR on Internet Explorer an activeX plug-in was required. But it failed to install and gave the following error. "windows has blocked this software because it can't verify the publisher"
Solution that worked for me: 1. Open internet explorer, click Tools – Internet Options . 2. Click the Security tab – Custom Level button. Under ActiveX ensure the following are set to enabled
Run ActiveX and plug-ins – Enabled Download Signed ActiveX Control – Enabled Script ActiveX controls marked as safe for scripting – Enabled
Set the following to “Prompt ”
Download unsigned ActiveX Control – Prompt Initialize and script ActiveX controls not mark as safe – Prompt
3. Click OK and Apply and OK. Restart the browser.
Now browser will tell you that the current setting is not secure ' would you like me to fix the settings'. ignore that error for now.
  4. install the necessary Plug-in 5. restart browser. 6. this time allow browser to fix the settings. because we have already installed what we needed.