No it's not being used at all.... I know that, as the only two programmes that used each file were 1) uTorrent (to download it) and VLC Media Player (to play it) Both aren't using it, and it has been "deleted" from uTorrents list so I can remove the file from my PC.....
Which is why I can't understand what's stopping me delete the files
How do I find out if any other programme etc is using the file and stopping me delete them?