what camera do you use? Canon? Nikon? For Nikons, the raw file is a .NEF file. You'll need a raw converter to process the file. Photoshop can do it, so can Nikon's software, so can Lightroom or Aperture. But if it's an older computer you probably need an update. For example, for photoshop, you can use Adobe Camera Raw (ACR):

Windows: http://www.adobe.com/support/downloa...atform=Windows
Mac: http://www.adobe.com/support/downloa...form=Macintosh