When I installed Windows 7 Beta on my Acer Ferrari 3400, the Synaptics Touchpad was recognized as a PS/2 compatible mouse. I missed the scroll function of the touchpad driver. Since the Windows 7 is just beta, there is no dedicated driver for it.
However, I found that the driver for Vista is working just fine. You can download Synaptics drivers from the company’s web site.
A tip for downloading drivers from the web: always download the driver from the official site or the manufacturer’s web site. There are a lot of other sites that offer drivers downloads. Those downloads may be infected by spyware, so be careful when using those drivers.
I just installed the Vista 64 bit driver on my Windows 7 RC 64 bit machine. The version I downloaded is v10.1.8. After installation, all the settings are available. Here are some screenshots:
I tried this on Windows 7 RTM, and it works, too. The version is the same: 10.1.8. Here is a screenshot:
Synaptics now has the driver certified for Windows 7. The version is v14.0.3
If the driver does not work for you, you can try to uninstall the device first, reboot, and try the installation again. Here is my post about how to uninstall a device on Windows 7.