How about disabling the touch pad and using the external USB mouse?
Or, find the latest driver for the touch pad by clicking Technical support tab at the top of this page.

That's not going to work either, I had a 9100 for over a year.

I had this particular symptom, however it varied as to when it would actually do this.

I never really found a way to resolve this issue.

I had that problem, cleaned the touchpad, and was fine for as long as I used clean hands on it.

I understand what you're saying, but this is a completely different issue which has nothing to do with non-greasy fingers ;)

My mouse did that intermittently. It was so frustrating. Then some of my keys stopped responding. I thought I'd have to replace the entire touchpad and keyboard. I took it to a laptop repair place and there was a much easier and cheaper solution. They severed the connection to the little blue mouse-button thing in the middle of the keyboard, and that's it! I was dubious that this would solve the problem, but both my key problem and that horrible drifting mouse hasn't happened once since then.
Good luck!

Instead of severing the connection, you can disable it off in touchpad settings.