Internet Explorer: “Windows has blocked this software because it can’t verify the publisher” Error
Posted on Jun 19, 2008 under Internet Explorer Tips |In Internet Explorer, when you try to install an ActiveX control at the To help protect your security, Internet Explorer stopped this site from installing an ActiveX control on your computer…Click here for options prompt, you get an error when clicking Install activex control.
Windows has blocked this software because it can’t verify the publisher
To try to fix this problem, perform the following steps.
1. In Internet Explorer, Click Tools > Internet Options.
2. Click the Advanced tab.
3. Under Active X, set Download Unsigned ActiveX to Enable.

by Mark Sowul, on June 20 2008 @ 4:14 am
Please don’t do this. There’s a reason why unsigned ActiveX controls are blocked, and it is a very bad idea to reenable them globally here. It would be better to only do this for “trusted sites” and add the site in question to that list.