I had a Asus desktop that had Windows 7 pre -installed. After a few years and lots of problems I determined that I needed to reinstall Windows 7. After reinstall Windows 7, there is no internet connection. It says "No connections network adapter missing"
How to see your PC motherboard number or models? For me I open my PC case and check the motherboard models.
How to open your PC case?
Use your screwdriver to unscrew both thumbscrews holding the side panel onto the computer chassis. The screws are located on the back of the tower, near the side panel you are removing. Slide the side panel toward the back of the computer. Lift and remove the cover.
For me what I did :
[ Once you found your mother board models u need to surf from another PC to download the LAN driver into the USB and trasfer to your computer.]
Go here Asus Download
My Model : P5G41T-M LX | Motherboards | ASUS Global
You will notice the below :
LAN (2) - Click here -
Description Atheros PCI-E Ethernet Controller V188.8.131.52 for Windows XP 32bit & XP 64bit---(WHQL).
Atheros PCI-E Ethernet Controller V184.108.40.206 for Windows Vista 32bit & Vista 64bit---(WHQL).
Atheros PCI-E Ethernet Controller V220.127.116.11 for Windows Win7 32bit & Win7 64bit---(WHQL).
5,33 (MBytes) 2009.12.29 update
Global (DLM) Global P2P
Description Atheros AR8131 PCI-E Ethernet Controller V18.104.22.168 for Windows XP 32bit/XP 64bit--(WHQL).
Atheros AR8131 PCI-E Ethernet Controller V22.214.171.124 for Windows Vista 32bit/Vista 64bit--(WHQL).
Atheros AR8131 PCI-E Ethernet Controller V126.96.36.199 for Windows 7 32bit/7 64bit--(WHQL).
4,57 (MBytes) 2009.12.11 update
Global (DLM) Global
Just download the above 2 into your USB and install into the PC that is is not working.
That's it- after that you can connect to the internet.