DF Robot W5200 Ethernet Shield for an Arduino Uno not working?
Don't use the MAC address of your computer read from ipconfig output. It creates a conflict on LAN. Use the MAC address from examples.

To troubleshoot Ethernet shield, use the Ethernet library newest version 2.00. It supports W5100, W5200 and W5500 and has better diagnostic in examples. 

And to troubleshoot, always connect the LAN cable to router or switch, not to computer, because direct connection to computer requires manual setup of addresses (no DHCP).