How to middle click on a "two-button" nx9420 touchpad?!
It was quite a problem for me.I could not pan in AutoCad and/or 3ds max and i really wanted to. I even thought about getting a 3 button replacement from hp and install it myself. I use a mouse most of the time but, a touchpad middle click CAN help a lot when you're "tab" browsing with Firefox or IE, not to mention when taking a quick look into a dwg file.
Today, while browsing, i discovered something wonderfull... You can middle click by pushing BOTH buttons with your finger at the same time.... YEY... superbly done :D
There is onle one catch though, you have to use an older synaptics driver version 8.3.8, which is available through windows update(recommended) or hp's web site at
Synaptics 8.3.8M driver