A good set of freeware codecs and tools is here, all compatible with 7: Codec Guide: K-Lite Codec Pack - Windows 7 codecs I installed K-Lite Codec Pack 64-bit because I couldn't play one of my DVDRips. K-Lite Video Conversion Pack contains the following applications: Avidemux is a very powerful tool for editing video files. It supports almost every type of video file as input. It can do lots of things: cut, remux, convert, etc. It contains its own decoders and encoders for all common audio and video formats, so it does not need any codecs. ImgBurn is a versatile tool for burning DVDs. DVDStyler is a basic DVD authoring tool. With this you can create your own video DVD, complete with a custom menu. I've been using K-Lite stuff for a long time, and been happy with it. But there is another alternative to K-Lite: Shark007.net - Windows 7 Codecs - WMP12 Codecs Don't know how good this last one is.