Hmm... update appeared to install but n800 will not restart manually. I did not restart itself as I left it to do it it'self. It turns itself off near end of start process when blue bar is about 80% of way across screen and then back on again in a loop. If I take memory cards out of n800, blue bar gets gets right across screen then it does same thing; blue light flashes three times it turns off and then restarts and goes through this process in endless loop. Anybody any solution please?