Add the Microsoft Loopback Adapter:

• In the Device Manager select click Add legacy hardware.
• In the Add Hardware Wizzard, select Install the hardware that I manually select from a list (Advanced)
• In the Common hardware types list, click Network adapters, and then click Next.
• In the Manufacturer list, click Microsoft.
• In the Network Adapter list, click Microsoft Loopback Adapter, and then click Next twice.
• If a message about driver signing appears, click Continue Anyway.
• In the Completing the Add Hardware Wizard dialog box, click Finish, and then click OK.