Well depending on the type of video.
*.mpeg amoung others was WMP
*.flv was FLV player
I'm downloading VLC player right now and i'll see if that corrects the problem.
This also seems to be occuring with my completed downloads.

Okay,

Thanks LOTR. Downloaded the VLC player and now my previews and completed downloads.

Thanks heaps man.

If that didn't work, I think I might have reverted back to previous versions of Limewire.