Here’s a step by step removing process for the Microsoft loopback adapter in Windows XP, Vista & Win7.

Windows XP:
1. Open My Computer.
2. Right Click on My Computer, followed by clicking Properties.
3. By default General Tab displayed.
4. Click on Hardware Tab -> Device Manager.
5. Click + near Network Adapters.
6. Click On Microsoft Loopback Adapter, followed by click delete button.
7. Confirmation pop up, choose OK

Windows Vista / Windows 7:
1. Open My Computer.
2. Right click on My Computer, followed by clicking Properties.
3. Click on Change Settings.
4. By default General Tab displayed.
5. Click on Hardware Tab -> Device Manager.
6. Click + near Network Adapters.
7. Click On Microsoft Loopback Adapter, followed by click delete button.
8. Confirmation pop up, choose OK