I think I'm lucky that they stole my tx2.
You should have waited only 2 months more for the tm2.

I have a 1370US from about the same time period and am running Win7 64bit.  It came from Best Buy with something like Ntrig 2.09 on it (don't remember the exact rev), but I updated to 2.185 from the HP website.  Both versions seemed to work OK, but every once in a while the touch would go away until you disable then enable again in Control Panel.  Unfortunately, 2.185 didn't support more than 2 fingers. 

So when 2.239 came out, I hoped it would fix the touch disappearing.  I did not, but at least I got 4-finger touch support.  However ONLY with 2.239, I get the random ghost movement of the cursor every once in a while.  You can move the cursor away breifly, but it will snap right back to the original point after a few seconds.  A USB mouse or the touchpad will let you override it long enough to get to the Ntrig Calibration button in Control Panel where I can do a recalibration and it will go away just like that.  It only happens now and then.  Most of the time its fine. (I actually put a shortcut to it on my desktop for this very reason).

Try doing an Ntrig touch recalibration.  It might fix your issue.  If that doesn't work, start from the original Ntrig driver that came with the machine and then upgrade to 2.239 if you get the original driver to work.

Sorry but the 2 videos has nothing to do with touchscreen.

One is bad grounding line and the other, the touchpad problem, happens on tx without ntrig too.

Anyway I understand the other ntrig problems...