saidgta isn't the only one to receive two bad units.Or you have the absolute worst luck in the world. I just talked my friend into getting a SP4 earlier today - after a reload and driver update / install, his is running wickedly well. I genuinely feel bad for you if you've managed to get not one, but two bad SP4s - I mean what are the chances?? Perhaps you should switch to the crappy fruit brand.
I'm waiting before trying a third but multiple bad units would seem to indicate the problems are not statistically insignificant which would also seem to be borne out by the topic of this thread.
Just because X fixed your problem doesn't mean X will fix every problem.
I actually Reset one of them 4 times. Two of the four times it Blue Screened during setup and failed. The other two times did not fix *any* of the problems. That would be a total of 5 installs counting the original time. Perhaps I needed to try a sixth or even tenth but I think I gave it a fair shot.