I had this issue also, as I just installed Windows 7 32-bit to my girlfriends Compaq Presario V3000 yesterday, which was running Windows XP before. I noticed right away that it didnt have sound, and while clicking on the bottom speaker icon, it would give me a message saying that it couldnt install the driver for whatever reason, cant remember the exact message now. So I googled "windows 7 v3000 sound" and this thread was the first to pop up in the listings. I also tried recommendations from other threads, such as downloading the Vista driver from HP website, and running it on compatible mode, but none worked.
Eventually for whatever reason I decided to try and find the old XP driver through the C: drive. I went to Local Disk...