The Virtual Machine with Windows 7 shows 'duplicate IP address detected' when there are absolutely no duplicates.
Operating Systems: Windows 7
Solution
1. Go to the regedit.exe
2. Locate this registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
3. New, and click DWORD Value
4. Type ArpRetryCount
5. Right-click the ArpRetryCount registry entry and click Modify. In the Value box, type 0 and click OK
6. Shut down the VM and start it again. Check the IP address of the NIC, the static IP should be set to preferred.