I called up Asus support and after waiting for several minutes I, they answered me. A representative advised me to do a factory reset. I backed up my dat (musics, photos in the microSD) and then do the hard reset. I did this at about 6 pm yesterday. So upon resetting, the tablet wnet straight into ICS. In fact there is a new Asus Water II live wallpaper whihc was notthere when I upgratded to ICS from HC. I like this new live wallpaer, whihc is also in the Prime of course. So now it is about 6 pm. After 24 hours, there is no random reboot. So far......