Problems-XP Media Cntr Edition

A friend recently got an error on her Gateway Pc stating that one of her ‘drivers’ is not functional and her pc would not boot up. She was then advised to load a ‘System Recovery’ CD to solve the problem. When that was done the PC OS was reloaded and she lost all her personal files. The problem though is that essential DRIVERS for the video, audio, and modem etc. did not install – Device Manager shows these things under ‘other devices’ as a yellow ‘?’. Does anyone have any suggestions how to correct this problem? Right now she has no audio, video or internet capabilities as an error keeps popping up ‘hardware not detected/installed’….:(