can you provide the make and model of your laptop? on some laptops you will have an icon which looks like a mouse on one of the 'F' keys, IE 'F1, F2, F3' etc.
You can either press this button to enable or disable your mouse, or you may need to hold down the 'fn' key (usually located botton left of keyboard) and tap the appropriate 'F' key.
I think you may have disabled 'Synaptics pointing device' which is required for the correct operation of your mouse pad.
Not a big problem you should be able to use an external USB mouse to navigate around and re-enable the this.
Once you are in Windows you will need to hold down the windows key, and tap 'R' this will launch the 'Run' window
type MSCONFIG and press enter
This will open another window.
Select the startup tab and recheck the entry for synaptics points device.
This should solve the problem
please post back with results,