Second, IE has a menu-Tools-Internet Settings-Advanced-that allows you to install or run software, even if the signature is invalid, check it and make sure to reinstall it.
First, close the browser and restart it. If it doesn't work, your installation fails.
Second, IE has a menu-Tools-Internet Settings-Advanced-that allows you to install or run software, even if the signature is invalid, check it and make sure to reinstall it.