Touch pad on laptop stopped scrolling

[jimpl]

 It just quit scrolling. I can't find the place to fix it. I go:
    start/control panel/mouse/device settings
all there is is buttons settings. I used to get a picture of the pad and adjustments for the edges.

  Vista business
  Toshiba laptop x305 q705
  Jim
 more info:
I just found @ start/control panel/mouse
 it identifies as standard pointing device instead of synaptics touchpad.
   more info"
I went to Toshiba support site and looked at the drivers listed. there was one named "alps touchpad 27773a".
I downloaded and installed that and now the scroll works!
I don't know why. I'm pretty sure I have the Synaptics touchpad.
  Jim

[Carbon Dudeoxide]

Sounds like the driver was removed or was damaged somehow.

Problem gone?

[jimpl]

It seems to work fine!
 When I run my autocad, it even scrolls side to side!
  Jim

[jimpl]

My touchpad just switched itself back to "standard pointing device" and does not scroll anymore.
How can it change like that by itself?  I fixed it before by downloading a driver for ALPS touch pad. I shouldn't have to just keep downloading drivers!
  Jim

[jimpl]

 OK I rolled back the driver and now it works again. Now it says it's an alps pointer again!