Laptop Cursor Jumping

Hi,

I have a Dell Inspiron 14R 5420 with Windows 7 64-bit. The touchpad cursor jumps around, and I cannot type properly.

The system says my touchpad driver is working properly and up-to-date.  Synaptics 15.3.2.1

However, when I go to Control Panel > Mouse > Mouse properties > Dell Touchpad the following options are NOT accessible. Nothing happens when I click on them.

Touchpad settings Scrolling and Zoom Settings and Jog Shuttle Settings

Also, the command Fn + F3 does not work. This should turn off the touchpad, but it doesn't.  Fn + other features work correctly.

I have not tried to uninstall the driver yet.

Can someone please help.

Is there another touchpad driver I can install for this Dell system?

Thanks

Andrew