There is an IP address conflict with another system on the network

Every IP must be unique, your machine has the same IP as another on the network.
If the Addresses are assigned with DHCP simply click on start/run, type cmd
now type ipconfig /release, then ipconfig /renew

If the IP address is set manually go to start/control panel/network & internet connections/network connections

right click on local area connection and choose properties.
select internet protocol (TCP/IP) an click on the properties button.