Disabling Remote UI 
The Remote UI is useful because the machine settings can be specified by using a Web browser on a computer. To use the Remote UI, the machine must be connected to a computer over the network. If you do not need to use the Remote UI, you might want to disable the Remote UI to reduce the risk of having your machine controlled remotely over the network by malicious third parties.
1
Tap <Menu> in the <Home> Screen.
2
Tap <System Management Settings>.
If a screen for entering a PIN is displayed, enter the PIN with the numeric keys and tap <Apply>. Setting the System Manager PIN
3
Select <Remote UI Settings> 
<Use Remote UI>.
<Use Remote UI>.4
Tap <Off>.
<Off>Disables the Remote UI.
<On>Enables the Remote UI.