Lots of different ways. You could use tools like DvdShrink to compress and rip a movie to your hd and then use player softwear to view it, like Power DVd. Alternatively, you could use conversion software to turn the DVD (after decrypting) into a normal avi or mpeg file which you could then view using Window's own media player. Another way is to convert the DVD to the Divx format, which shrinks the size of the film quite a bit to save storage space. Remember, though, each time you compress or change the file format of the DVD expect to loose some viewing quality.