Checking for and Removing dual IPs on an adapter
Click Start >> Control Panel to open the Control Panel. Then click View network status and tasks.
Change Adapter Settings
Select Change Adapter Settings.
Open Adapter Properties
Right-click on the appropriate adapter (typically Local Area Connection) and select Properties.
Open TCP/IP Properties
Click on the Internet Protocol Version 4 line to highlight it, then click Properties.
Open Advanced Properties
Click the Advanced button.
Identify and Remove Additional Addresses
In the top pane, you should see a single IP/Subnet pair. If there are multiple lines, click each line below the first and select Remove. Click OK or Close on each open dialog to save the changes.