I can not find LAN driver for motherboard HP P6B580

You might have to open up your network connections click start control panel network connections this may vary depending on your operating system look for local area connection if you see a red x or a yellow exclamation or question mark you will need to update or install the driver or it could be firewalled
If you are trying to connect through a modem/router the driver should have come with a disc provided by your ISP internet service provider or your motherboard disc
you might have to connect the usb lead to your modem to get a connection then
click start control panel administrive tools computer management device manager scroll to network adapters should see a yellow question mark? right click install drivers if you cant find the driver hopefully one of these will help you

http://alpha.majorgeeks.com/Intel_Network_Adapter_Driver_for_Windows_7_d6273.html

http://majorgeeks.com/SiS191_Gigabit_LAN_&_SiS190_LAN_Driver_d5923.html

http://majorgeeks.com/IntelR_PROWireless_LAN_2100_Network_Connection_d4598.html Latest http://majorgeeks.com/downloadget.php?id=5240&file=15&evp=5fbb1c6e47482358c61a5236fb38a112
VIA LAN Driver. If you don