Unable To Get A Realtek AC Audio Driver To Work In Windows 7?

I am unable to find a suitable driver for my computer. I have a Compaq Presario R3000AP 3.2 GHz 2.5GB Ram and have upgraded to windows 7 with SP1. I did a clean install and all the windows 7 drivers were installed and are compatible except for the Realtek AC'97 audio driver. I downloaded and installed the Realtek AC'97 Codecs from the Realtek website, but unfortunately this was unsuccessful . Then I downloaded and installed the SP29586 Realtek AC'97 Driver version 6.0.1.6305 from the HP website and this was also unsuccessful. Finally I downloaded from the Microsoft website the same Audio Driver version 6.0.1.6305 and installed it but unfortunately again this was unsuccessful. In the Device manager under Sound, video and game controllers it show below "Realtek AC'97 Audio device", version 6.0.1.6305 but in properties is shows "This device cannot start. (Code 10)" Windows 7 does recognize the sound device, but is unable to completely install it, even though under the "driver file details tab" it show drivers installed in the windows directory. I understand that Microsoft does not support the Realtek driver, but there must be some kind of fix or even someone out there that is able to rewrite the driver somehow. Seems a shame to have to get a new computer because of this, as it is very fast with windows 7 even though it is only a Pentium 4.