Hi,

When I do typing on my laptop, touchpad disturbs a lot, it moves my cursor and wrong place and I have to do typing again and do correction. Also FN+mouse button is not working , I don't know why. Is there any way I can disable the touchpad while I connect external mouse to computer ? If yes then it will be really a great help for me.

Hi, Samsung laptops comes with synaptics touchpad devices, they already have option to disable touchpad if external mouse or any kind of pointing device is attached to laptop. You can find it under :
Control Panel --> Mouse --> Device settings..

Just look for :
Disable internal pointing device when external USB pointing device is attached and enable this.

Also, you can install software like : touchfreeze - Utility for Windows that disables touchpad automatically while you are typing text - Google Project Hosting