lock file

i have a lock file on my computer and can not delete it  it happened when i down loaded a game to compressed zip folder to send it to a game company to see if it was corrupt.  went to upload it to big fish and it would not upload. stated there was an error and could not complete. sent it by skydrive and also google drive but  the compressed files stated lock file.  does anyone know how to get this off my computer?  i sent another game before to big fish and it uploaded just fine this game will not.

beverly yeiter

ps you can e mail me with and answer if you would like   *** Email address is removed for privacy ***