Click on the OnGuard buttonin the left navigation menu.
Toggle the link activate/deactivate OnGuard to activate or deactivate OnGuard. Note that OnGuard has to be activated for any of the OnGuard tools to be enabled. You can have as many OnGuard tools enabled or disabled.
To enable an individual OnGuard tool, ensure that OnGuard is activated. This will list all OnGuard tools. Select the desired OnGuard tool and click the enable link. Disabling is done by toggling the link.