Hello hmnt,
Try updating the BIOS on your notebook if you haven't already. Click here for assistance.
Also, download and install the following driver, just to make sure you have it: Synaptics TouchPad Driver
If the steps from the above links don't resolve the issue, please call our technical support at 800-474-6836. If you live outside the US/Canada Region please click the link below to get the support number for your region. http://www.hp.com/cgi-bin/hpsupport/index.pl
Best regards,