How to Install PCI Simple Communications Controller Device Driver Software in Windows 8 1

When i installed Windows 8.1, i found &Manager&displaying driver software are not installed for the following devices: PCI Simple Communications Controller and Unknown device. Solution: Right click the device which has no driver or driver problem, and choose the option &Driver Software&This will check online for the device driver software, and then Windows will finish installing the driver software for the device: &Management Engine Interface'. This will remove Other devices which shows yellow exclamatory warning symbol. Note: The modem or the network adapter is listed as an Unknown Device or with a generic name such as Ethernet Adapter or PCI Simple Communications Controller.