How to solve touchpad problems with the ASUS G73Sw
The touchpad ships assembled using some kind of sticky tape. This causes the touchpad to randomly start detecting two, three fingers, and moving the mouse cursor erratically or dragging / tapping. Here is how to fix it.
Unfortunately, the fix requires opening the laptop case.
Once you have exposed the touchpad's other side (about two-thirds into the video), carefully remove the sticky tapes on top of the metallic film, and making sure not to leave any sticky goo behind it (but watch out, don't scrape it -- use the sticky tape to remove the goo). There should be five and they should be greyish in color.
Put your machine back together. The problem will be fixed.