Yeah, it looks like we've all been largely screwed.
I bought my HP Touchsmart TX-whatever the hell a year ago, and it worked amazingly well,touchscreen and all, until halfway through the summer. Then it started getting this USB Device Not Recognized error this is about.
The one thing that's odd about mine is only the touchscreen is affected -- I can't use it, and that's why I bought the darn computer in the first place. All other peripherals and USB devices function fine at all times. I've tried several fixes like listed here, and regardless of what I try, at some indeterminable and random time I will always get USB Device Not Recognized and the touchscreen will stop working.
Soemtimes it will say it just once and fix itself sometime later. Sometimes it will literally spam DA-DUN DU-DAN telling me over and over and over again until I restart it, to which the N-Trig application then says "device cannot be opened" or some sort.
My computer does have minor structural damage near the ventilation, but is absolutely fine with cooling regardless and no loss of function can really be linked to the damage. It has had rough exposure to the elements because I used to use the convenient touchscreen to use it while mobile, but now I can't do that.
My family never purchased a warranty. Worst decision ever, but good in some way -- I didn't pay those cretins any more than I needed to.
It appears there is no definable solution to this problem, but many solutions that could work or work temporarily.
We need statements from these companies, but we'll probably just have the blinds shut on us.