Você pode tentar usar o programa chamado "twofingerscroll"
Eu usei e funciona bem para mim.
This project aims at providing a tool for Windows platform adding some useful two finger gestures to Synaptics TouchPads. These TouchPads can be found in many todays laptops and many of them support multiple finger gestures.
Currently supported gestures:
- Two finger scrolling - scroll vertically by sliding two fingers anywhere on the TouchPad
- Two finger tapping - tap with two fingers to simulate a selected mouse button
Faça o download aqui