Hello Shibara and welcome to Seven Forums.
- Create a restore point before you do anything else. Name it pre-synaptic driver
(or something else) so it's easy to find it again.
- Go to the HP driver download support site HP Support & Drivers | United States
- Click on the small down arrow in the Drivers
& Software box.
- Type in Pavilion dv6000, click Search
- Click on your specific model (probably the first one, dv6000 CTO notebook)
- Select your original
operating system (that would be Vista or Vista 64 bit)
- Open the download for Keyboard, Mouse and Input Devices
- Under synaptics touchpad click on More Info and you should see the driver package called sp37065.exe (you can either click on it to open and install or you can save it to a convenient location, like your desktop.)
Personally, since this is a Vista driver, I'd save the .exe file and install it using Compatibility Mode. Hopefully Windows 7 will recognize the driver and give you full Synaptics functionality. Compatibility Mode
If this doesn't work, use your restore point to roll back your computer. You can try downloading the generic 32 bit or 64 bit Synaptic driver directly from Synaptic. But as they warn, it may not work because each computer manufacturer customizes the basic driver to work with their specific computers. If it doesn't work, you may have to use the restore point again and just learn to make do with the sensitivity issue. Drivers | Synaptics