Lately I have had a few probs with 'misrepresented' files. Hence I wish to use the preview facility to ensure .mpg or .avi files are what I expect before downloading hundreds of MB to find I have something 'strange'. I cannot find how-to-use the Preview facility anywhere in FAQ or the user guide. When I've tried to use it, Nero Media Player pops up and informs it cannot open the file. Why Nero, when I have the Limewire media player checked? (Yeah...I must have checked Nero as the default opener of this type of file), but I can't get the Limewire player, nor VLC, to even recognize there is a file there! I'm using v 4.9.28 Pro. I know the answer to my prob must be there somewhere, but I'm damned if I can find it! Thanks. (I'm just wasting too much of my download allowance at the moment)