As I understood you message: the touchpad is working properly but only the scroll function does not work. Right?
In such case I would recommend checking the option in Control Panel -> Mouse
Here you will need to switch to last tab and go to Advanced Settings.
Usually, there you should find the settings for touchpad:
It could be useful to update the touchpad driver.
Not quite sure why this happens with your notebook but the advanced touchpad options (scrolling etc…) are controlled by touchpad driver and I think it’s worth to update the touchpad driver.
Still experiencing int'mit loss of scroll function(up,down & left,right). 3 or 4 times/week (annoying!)
1.Only occurs with IE9, various web sites, none in particular.
2.Can restore function by exiting & then restarting IE9. Then go to same web page that problem occured & is OK.
3.Have done a 'Restore Advanced Settings' & a 'Reset IE Settings' in Internet Options Advanced. Still int'mit problem.
4.Synaptics touchpad software installed is Version 188.8.131.52 (the same version downloadable from the Toshiba website)so I don't think uninstalling & then reinstalling the driver would make much difference.
Any suggestions appreciated, very annoying problem