Get rid of the said download as it has some sort of corruption in it..
I have came across this situation more than once myself....At the moment i have some sort of corruption in my HD and cant enter that as I get the error report and close down message..But I have no idea what is causing it and don't know what to delete...
Try going to Start > Search enter the title of the movie and delete it from there or if you can enter LW without a hitch delete it from there....