It is not possible to use Windows Media Player to rip movie files from a CD to your computer's hard disk. However, if you can see the movie file on the CD in Windows Explorer, then you probably can copy and paste that file to your computer's hard disk instead.

It is also not possible to rip a movie file from a DVD using the Player. You need to use a program designed to legally copy movie files from a DVD to a computer.

Take a look at this though:
Step 1

Download DVD-ripping software. DVD Decrypter is a free DVD-ripping software. Handbrake is also free and works well with Mac systems. Follow the prompts to install the DVD-ripping software to your computer.

Step 2

Install DVD43. DVD43 is a program that opens at start-up and runs constantly on your computer. It allows your DVD-ripping software to see the files even on copy-protected DVDs.

Step 3

Place the DVD you want to rip into your DVD drive. You must have a DVD drive to read the files. A CD drive will not be able to rip from a DVD. Open your ripping software. Your ripping software should recognize the DVD in the drive.

Step 4

Choose a destination for your download. In Handbrake, you will select a file type, such as MP4, into which to convert the downloaded DVD files. Handbrake will automatically save the file as an MP4 and it will be ready to use when ripping and converting are complete. In DVD Decrypter, you will be able to pull off either the VOB files or the IFO files. You want the VOB files. To select this option, under "Mode," make sure "File" is checked.

Step 5

Rip the movie. There is a single button in each program for ripping/converting. Just click the button to begin. It will save as the file type you selected in the location you chose. Progress will be tracked on-screen.

Step 6

Download and install DVDx. If you used DVD Decrypter, DVDx will convert your DVD files into more computer-friendly file types, like AVI or WMV.

Step 7

Convert the IFO files with DVDx. Under "File", click "Open IFO". Click on "Input Settings" and press the button that reads "Whole," by "Max frame," then press "OK." Click on "Output Settings," browse for the folder where you would like to save your file and name the file. Press "OK." To convert the file, press the "Encode" button. A pop-up screen will tell you when the conversion is complete.

Source: http://www.ehow.com/how_5052689_download-movies-computer-dvd.html

I hope this helps!

Brett M,
Windows Outreach Team