Disable IE security prompt for Windows Installer scripts
Computer Configuration\Administrative Templates\Windows Components\Windows Installer
Allows Web-based programs to install software on the computer without notifying the user.
By default, when a script hosted by an Internet browser tries to install a program on the system, the system warns users and allows them to select or refuse the installation. This policy suppresses the warning and allows the installation to proceed.
This policy is designed for enterprises that use Web-based tools to distribute programs to their employees. However, because this policy can pose a security risk, it should be applied cautiously.