When starts or resumes, it sees the network connection coming up.
Assuming it is configured to 'obtain an IP address automatically' ( check this ), then it will contact the DHCP server ( usually your router ) and request an IP address ( or permission to continue using the one it has previously got ).
When it's given one, windows then does a 'sanity check' to make sure the address is really free.
This is called 'Duplicate Address Detection'.
( It uses a process called Gratuitous ARP, where it sends out a query on the network for the address. There should be no response. )
If there is a response, then it throws the error you see.
Either the DHCP server messed up ( unlikely ), or you have something on your network manually set to that IP.
If you need to manually set the IP of something ( like a printer ), then set it to a high number ( eg 192.168.0.200 ) and then make sure this range is excluded from the DHCP server scope.
If you tell us the full MAC address of the offending device, ( xx-xx-xx-F2-F8-24 ) we can probably tell you which device on your network is producing the conflict.