Hey, i have just formatted my computer and had no drivers for sound installed and media player was displaying the error message. i downloaded and installed the
realtek AC'97 audio driver but i still have no sound after installing it ??

not sure if its somthing to do with the MPU-401 Compatible MIDI Device? not sure, heres my comp specs....
Main Circuit Board
Board: P4M266-823X
Bus Clock: 100 megahertz
BIOS: Phoenix Technologies, LTD 6.00 PG 07/31/2003
Processor
2.60 gigahertz Intel Celeron
8 kilobyte primary memory cache
128 kilobyte secondary memory cache
Multimedia
MPU-401 Compatible MIDI Device
Realtek AC'97 Audio for VIA (R) Audio Controller
Standard Game Port