Block driver co-installers

A co-installer is a user-mode Win32 DLL that typically writes additional configuration information to the registry or performs other installation tasks that require information not available when an INF is written. If you enable this setting, co-installer execution will be prevented, and additional configuration software for specific devices (mouse devices, gaming keyboards, etc.) must be downloaded and manually installed from the manufacturer's website. If you disable this setting, co-installer execution will be permitted, which is a significant security risk (potentially dangerous code execution).