Unable to install Active. X Windows has blocked this software because it cant verify the publisher IT Support Guides. Problem When you attempt to install an Active. X control for Internet Explorer you receive the following message Internet Explorer Add on Installer Security Warning. Windows has blocked this software because it cant verify the publisher. Open Internet Explorer. Internet Explorer Add On Installer Windows Has Blocked This Software' title='Internet Explorer Add On Installer Windows Has Blocked This Software' />Windows has blocked this software because it cant verify the publisher. Solution You are seeing this message because the Active. Sterling Tube Templates there. X control has not been through the verification and signing process. This may mean that the software is malicious and could harm your computer or, even more likely, that the software producer saved a few dollars by not verifying the software. For this reason ensure the software is from a source you trust before following the steps below to allow it to install. There are a number of ways to allow the software to install. The steps below will describe how to add the website to your trusted list and then allow trusted websites to install unsigned Active. Steps to Fix Windows has blocked this software because it cant verify the publisher. Open Internet Explorer and Press the Alt key while youre on Internet. It says Internet Explorer Add On Installer. Windows has blocked this software. It says Internet Explorer Add On Installer Security Warning Windows has. Installing Adblock Plus for Internet Explorer is a. Metro Mode of Internet Explorer on Windows 8. Adblock Plus for Opera is a very useful addon that. Can anyone help me on resolving this issue as i am struggling to fix it for a client. Windows has blocked this software because it cant verify the piblisher. Internet Explorer ActiveX AddOn Installation. Most versions of Internet Explorer run in 32bit. SecureAuth Internet Explorer AddOn MSI. X controls. If the window is still open, click OK to close it. Press Alt on your keyboard to show the file menu. Click on the Tools menu then Internet optionsOpen the Security tab, sleect Trusted sites then click on the Sites button. Under Add this website to this zone you should see the website address if not, enter it in. Un tick the Require server verification for all sites in this zoneClick Add to add the website to the list. Click Close to close the window. Now back in the Internet options window, click Custom levelScroll down until you see Download unsigned Active. X controls and under it select EnableClick OK. A warning message will appear, click YesClick OK again. Now the Active. X control will install successfully.