If the card is now installed according to device manager it could be a negotiation issue as well (card and router cannot decide how fast they can talk to each other) open Network Connections in control panel
Right Click the Local Area Connection and select properties. Then on the upper right of the screen select the Button marked Configure.
On the advanced Tab look in the properties screen for
Link Speed Duplex or Media Type or Connection Type then when it is highlighted look at the value. If it is set to auto Negotiate use the down arrow and change it to 10 Half Duplex (10 Base T) and select OK and OK or close. See if the local area connection then loses the Red cross for Network Cable unplugged. If it does then try the connection.