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Normally, the PCIe Simple Communication is included in Windows or your OS, otherwise you'll need to decipher the Vendor and Device.
Open the Device Manager, Details, and Device:
Example PCI/VEN_10EC&DEV_8139; Vendor = 10EC (Realtek) and Device = 8139 (NIC model)
You can use something like DriverAgent -
http://www.driveragent.com to identify and aid in installing the latest driver. I find it best to download the drivers on your OEM site {MOBO, GPU, Device} all per your correct OS.