Elitebook 6930p Missing "Base System Driver"

Hi,

I have an Elitebook 6930p and there seems to be no sound coming out of the speakers. I recently reformatted my HDD so I could install Window 7 over the original Window Vista. I tried to download the driver (sp45115.exe) provided by HP for my notebook with the OS of Window 7 32-bit but as I continued the installation, it told me "The audio driver files do not support your computer hardware."  I looked around the Device Manager and it seems to have a missing "Base System Driver" so I'm assuming that might be the problem since it's the only  missing driver. Can someone help me get the speaker sound back? Thank you!

Hardware IDs "
PCI\VEN_1180&DEV_0843&SUBSYS_30DB103C&REV_14
PCI\VEN_1180&DEV_0843&SUBSYS_30DB103C
PCI\VEN_1180&DEV_0843&CC_088000
PCI\VEN_1180&DEV_0843&CC_0880

Location: PCI bus 133, device9, function 2