You will be able to completely disable keys on the keyboard, that you consider to be "dangerous". You can use this feature to avoid a lot of built in Windows keyboard shortcuts. For example by disabling "Alt" button, you will disable all key combinations that involve it, such as Ctrl+Alt+Del for example.
Please take care not to disable any vital key combinations that you might need. Think this through very carefully, because this setting is equivalent to pulling that key with your pliers out of keyboard. It will not work anywhere starting at boot sequence and any other application.