I have a Synaptics Touchpad on my Compaq Presario 1830. I grew tired of using the touch pad so I installed a Belkin mouse (not USB). When I installed it, a dialog popped up saying if I want to make the Belkin mouse the default mouse device. I said yes. Now some of the buttons of the Synaptics touchpad on my Compaq won't work anymore. I tried installing the drivers that I downloaded from Synaptics website, but I keep on getting this error:

The top part of the window in the blue bar said "Enum\BIOS\*PNP0F13\0D" and the error message was "SURegCreateKey".

What does this mean? How can I fix it and restore all the functions of the Synaptics Touchpad?