Hi,
The notebook model you have is shipped with the Synaptics touchpad driver. Please follow the below steps to enable scrolling features:
1. Open Control panel -> click on Mouse . It will display Mouse Properties dialog box.
2. Under Mouse properties Window click the Device Settings tab
3. Click on Device Settings -> Settings button. This will display the Properties for Synaptics TouchPad on PS/2 port.
4. Follow the steps below to enable the Tapping Feature :
Highlight Tapping in the Left hand side , and Check the Enable tapping in the Right hand box .
5. Follow the steps below to enable Scroll feature:
Highlight Virtual Scrolling in the Left hand side and Check both the boxes in the right hand side.
6. Click OK .
Alternatively you can anble scrolling by reinstalling touchpad driver.
Touchpad driver for Vista:
ftp://ftp.hp.com/pub/softpaq/sp39501-40000/sp39534.exe
Touchpad driver for Windows 7:
ftp://ftp.hp.com/pub/softpaq/sp44501-45000/sp44940.exe
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