I have installed Display driver, chipset, network card driver, sound card driver, youcam and bluetooth but still the PCI Device and PCI Simple Communication controller drivers are not installed. The system works fine but I just wonder what are these components and their functions and as well the drivers that may make them work. Thanks.
That's a second-gen core i system so one of the drivers is probably the Intel Management Engine driver (found under the chip set section). The other may be the HP quick launch button driver or the card reader driver.