HP Hx4700

I have a couple of questions, first has anyone else had a problem with the Hx4700 switching itself on and running down the battery? I think it is something to do with the Credant Security tools which seem to start the machine and lock it. To combat this I have dissabled the security and uploaded ROM update 1.10. Luckily didn't have the problems of a previous poster though the update was fiddly, since then the machine seems to be OK (No security switched on though).

Second does anyone know of a downloadable player that will allow me to play AAC audio files?

Thanks,