I did not quite tell you that I had this same anoying problem when I first
started my new laptop. I did a lot of things you did by now, and I realy
cannot put a finger on it to, what caused the problem. All I can say that the
problem vanished somewhere on the run. Maybe it had nothing to do with the
settings, as you also doubt in the meantime. What we did not synchronise is
the fact that I installed and runned ever since is the Windows update
program. Witch, you know, runs on line updating your machine with windows
patches, but also installs new versions of your hardware drivers, maby that's
why the problem is solved on my laptop. So I suggest, if you did not by now,
that you start this. An other way is to visit your touchpath manifactory and
look for driver updates. You can Live Search for the site, or try some site
on advise for updating drivers. Don't install version tracker, you will
regognise, it is was a kind of helpzilla to me!