Your presentation plays back OK on your PC, but now that you have burnt it on to CD the video/audio clips no longer play. 

When you import video or audio clips into PowerPoint it just creates links from your presentation to the video/audio files. It is really important that when you burn your presentation to CD-ROM that you also burn the video/audio files on to the CD as well and that their relative postion to your PowerPoint file remains unchanged, otherwise the PowerPoint file will look for the video/audio files in the wrong place.

The easiest way to achieve this is prior to creating your presentation collect together in one folder all the video and audio files you are going to use. Then create your PowerPoint presentation in the same folder. 

When you come to burn the presentation to CD-ROM, burn the folder’s complete contents on to the CD, in that way your PowerPoint presentation will retain its relative position to your media clips and hence will know where to find them.

JPEG is fine for most presentation requirements, provided that the compression is not to high when the JPEG file is made.

If your images are large and paint up slowly on the screen try saving them as PNG files, they should then paint up quicker than JPEG files, but the overall size of your PowerPoint presentation file may be larger.

You should ensure that all bitmap images (i.e. scans etc.) are saved as RGB format files, rather than CYMK. This simply means that the colour information in your image is made up from RED, GREEN and BLUE (RGB) rather than CYAN, MAGENTA, YELLOW and BLACK (CYMK). Computer screens and  projectors all build up images using RGB, however colour printers tend to use CYMK to reproduce colour images.

We always recommend the use of the simpler styled fonts such as Arial, the characters have a constant thickness. Fonts such as Times Roman, with thin vertical strokes, can be difficult to read at a distance. Instead of using the underline feature to emphasis titles, it is better to use colour or a bold style of font. From a distance an underlined F will look like an E and an I can become a L.

If you have not used a standard Windows or Mac OS font such as Arial  you may need to install the font on the second computer.

If you have used a number of scanned images, audio or video clips you should check to see if the second computer is of a high enough specification to play the presentation correctly.

Check to make sure that you have imported all your images and not embedded them or appended them, otherwise they may not display correctly on the   second computer.

If you have not used any video, audio or linked files in your  PowerPoint presentation you need only burn the presentation file to your CD-ROM. Scanned images and clipart will be included in the PowerPoint file if they have been embedded and not linked, so you do not need to burn the individual scans or images to CD.

If you have used video, audio or linked files you will have to burn these to the CD. You must ensure that they are burnt on to the CD in the   same relative position to your PowerPoint file as they were on your hard drive.

The easiest way to achieve this, is prior to creating your presentation collect   together in one folder all the video, audio and linked files you are going to   use. Then create your PowerPoint presentation in the same folder, by burning the folder’s complete contents to CD your PowerPoint file will retain its relative   position to your media clips and hence know where to find them.