My touchpad stopped working after i recovered my

go to sony support site, http://esupport.sony.com/US/perl/swu-list.pl?mdl=VGNN110G
and reinstall driver for the trackpad/mouse from the site...
you can use tab key to navigate with out using trackpad.
alternatively try this:
you can go to control panel, system and maintnance, open device manager...collapse the mouse and other ponting device section. and uninstall drivvers for mouse/trackpad...
restat computer and the drivers for mouse should be reinstalled automatically

if you have the laptop`s driver CD reinstall it from there using an usb mouse