i have a compaq presario computer....... but there r lots of different types of compaq presario PC's.. i dont know wichone i have. it have 40 gb harddrive, 256 ram, Intel celeron processor. there is also this # "SR1110NX" located on the front of the computer. i just format my computer, so now my audio is not working. i need to install the audio driver. the sound card is built-into the mother board. i bought this at furure shop, the booklet that i got dosent say anything about sound card or driver, what driver should i install, and where should i get it..... my computer is only 7 months old, but i lost my recipt, so i cant go back to future shop and tell thme to fix it.... i also have warenty for the pc, but the recipt is lost.