Why can't Windows 7 add virtual network card

I want to install a Microsoft Loopback Adapter virtual network card for Windows 7. I have been stuck in the device when I add the device. I am searching for device …… please make sure that your device can be detected. How can I install it? ?
“ This question is quite special, let us look at the sharing experience of OldNew. ” It seems that Windows, which is the NT 6.1 kernel, could not add a virtual network card. It was found that there was no result on the Internet. Later, I remember that a long time ago, Windows 2000 had a hardware add wizard hdwizz.cpi, which can be copied to Windows XP. Is there a similar program for Windows 7/Server 2008 R2? Following this line of thinking, the path of Windows has been turned over for a long time and finally found two programs that are suspected of hardware addition wizards: hdwwiz.cpi and hdwwiz.exe (see Figure 1), both of which are located at C:\\windows\\syswow64. You can search for it. Overjoyed, immediately double-click hdwwiz.cpl and found that the device manager is open, not the hardware addition wizard I want. So double-click hdwwiz.exe, come out a window (Figure 2), happy to click the next button, found that it went smoothly, will not stay at all "Searching for devices … …", and finally smooth Installed the Microsoft Loopback Adapter virtual network card! After verification, this problem can be regarded as a bug, and no related patches are found. However, the exploration spirit of the user OldNew is very commendable. The previous experience follows the correct ideas to solve similar problems of the new system. What he said just now is that the NT 6.1 kernel means that Windows Server 2008 and Windows 7 are the same kernel. You can type ver by command prompt to check the version number.