My Acer Iconia A500 is a little over a year old and is prone to freezing, any time from startup onwards. It can be during games, reading ebooks, browsing, anytime at all. I then have to put it into sleep mode, repress the power button to reawaken it, and try again. I just had this happen 15 times during a two minute round of a game. It also "flashes" i.e. screen might zoom up or diminish in size, controls might suddenly be selected, keyboard sometimes appears and starts putting up random characters on the screen. It has become constant torment when I am using the thing. It happens without any warning, every time I use the tablet it happens to some degree, and for no apparent reason. It always happens if I open an app then turn the tablet around from a horizontal to a vertical view, or vice versa. It is driving me up the wall. Any clues?