An "ActiveX Signer Installer" typically refers to one of two things:
ActiveXSigner.exe /control:TrafficController.ocx /cert:CountyTrafficRoot /timestamp:http://timestamp.digicert.com activex signer installer
These often include an all-in-one ActiveX signer installer that bundles the cryptographic providers without the rest of the Windows SDK. An "ActiveX Signer Installer" typically refers to one
ActiveX controls allow web applications to harness the full power of the Windows operating system, but with great power comes great scrutiny. To run an ActiveX control safely, browsers require cryptographic proof of the publisher’s identity. This is where the becomes mission-critical. activex signer installer
Once verified, the installer registers the .ocx or .dll file into the Windows Registry, allowing the browser to execute the code.