Sorry to hear youre getting that kind of errors. If you already own the tablet I would suggest you get in touch with ASUS and see if they can help you with the problem, I havent had that kind of problems with my tablet, what sometimes happends to me is that it freezes and I have to restart the tablet from scratch, but that has happened like 3 or 4 times in a 6 month period that Ive had the tablet.
Yes you can. This device is like having a full fledged PC almost. As long as you buy the Amazon movies you don't need wifi.If you rent the movie it is stream only. I would also suggest not using windows media player. I would download movie player classic (k lite codec pack) or vlc media player from filehippo.com. I use media player classic and I love it.