Hi Paul ,
I have same problem with PCI Simple Communications Controller , I use windows 7 ultimate on 32 BIT , HP Compaq DC7700 CM
Problem in hardwer Ids :
PCI\VEN_8086&DEV_2994&SUBSYS_2802103C&REV_02
PCI\VEN_8086&DEV_2994&SUBSYS_2802103C
PCI\VEN_8086&DEV_2994&CC_078000
PCI\VEN_8086&DEV_2994&CC_0780
And device status is :
The drivers for this device are not installed. (Code 28)
There is no driver selected for the device information set or element.
To find a driver for this device, click Update Driver.