Windows has blocked this software because it can’t verify the publisher

I was trying to install some software on a client PC and kept getting this message: “Windows has blocked this software because it can’t verify the publisher”

As it turns out this is an ActiveX restriction.  Here is how I fixed it.

Open IE
Navigate to Tools-> Internet options -> Security (tab) -> Custom level

Under the Active X section:
Enable: Run ActiveX and plug-ins
Enable: Download Signed ActiveX Controls
Enable: Script ActiveX controls marked as safe for scripting
Prompt: Download unsigned ActiveX Control
Prompt: Initialize and script ActiveX controls not marked as safe

Do be cautious: make sure that what you want to download is not malware. The steps above do significantly lower your security settings but it just means you have to be a bit more cautious when downloading 🙂