This is very common problem and till yet unresolved. The Elantech driver disables right button + left button touchpad click. In the result you cannot aim and shoot in games also you cannot code that kind of interaction in your applications.
Driver detects LMB+RMB click but it somehow filters it so there is no effect -> it is disabled.
I could not find correct entry in the registry to disable that obviously horrible setting.
I have a huge problem with ElanTech touchpad. Without the ElanTech driver both the keys can be used at the same time(R+L). This is usefull in games like Mafia2 (can't play without it). When I install their driver I get the gestures, scrolling etc. but I can't use both keys at the same time. It is a common problem.
Please notice:
1. It has nothing to do with the Windows or hardware but only with the Elantech driver settings.
2. Driver detects LMB+RMB click -> it is shown on a dynamic icon on a task bar also uninstalling drivers fix the problem, but then you can't use your touchpad fully.
Has anyone have any luck with this or can we bring this to asus?