I created a slide show with music in windows 8 (movie maker) and my dvd player shows "wrong disc". is it my file type and if so how do I change the file type and to what?

Which media player are you using to play the DVD?

We would like to inform you that it is not possible to play DVD in Windows 8 natively. You need to have Windows Media Center to play DVDs in Windows 8. Refer to the following article for more information.

DVD playback options for Windows
http://windows.microsoft.com/en-us/windows/dvd-playback-help

If you have Windows 8 Pro, you can also buy the Windows 8 Media Center Pack that includes DVD playback.

You can also install a free third-party media player online. Important: Using Third Party Software, including hardware drivers can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting from the use of Third Party Software can be solved. Using Third Party Software is at your own risk.