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.