I have an Asus computer that i just installed windows 7 ultimate on but none of the network drivers got installed so I can’t connect it to the internet to fix the problem and I’ve look around on the internet to see is I can find a way to download them on my computer and install them on the Asus computer but no luck

Computer model: ASUS X54C

System----------------------------------------------------------------------------------
Manufacturer ASUSTeK
Processor Intel Pentium CPU B960 @ 2.2GHz 2.2GHz
Installed RAM 4GB
System Type 64-Bit Operating System
OS Windows 7 Ultimate service pack 1
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Drivers that need to be installed are:
Ethernet Controller
Network Controller
PCI simple Communications Controller
SM Bus controller
Universal Serial Bus (USB) Controller

Does anybody know where I can find these divers Ethernet Controller /Network Controller /PCI simple Communications Controller /SM Bus controller/Universal Serial Bus (USB) Controller?