This is a good lightweight player I have been using for some time.
Comes with all the codecs pre-installed and hardly uses up any memory so won't slow your pc down like others do e.g. wmp., It can also load thousands of movies at a time without lag. I have a 3tb hard drive full of movies (mostly 1080p) and loads them all with no problems at all. Plays all the obscure video files as well, so you don't have to download codec packs like you do with other players. Give it a try if you haven't already.