I just bought my NW-A808 recently and halfway through tranferring video files, the screen froze and I had to shut down the laptop by force. Then when I restarted everything, There appeared an error MP4 video file that looked part-loaded that took up 1.49MB of memory space but shows nothing. A message shows 'The file is damaged. Please connect to complaint software or device and transfer again.' And the worst part is, it doesnt appear on the walkman launcher on my computer, so I cant delete the bad file from there, and cant delete it straight from the MP3 player either! So I'm stuck with it! Please advise on how I can remove the bad file. Thanks