There is a well-known Great Wall in China. There is also a network great wall in PRC. Therefore we have to set proxy to access to some technical documents, source code for example from Google. Here record the proxy settings I once used.
netsh winhttp import proxy source =ie
import proxy source =ie in the
netsh winhttp context imports
the proxy settings in the Internet Explorer Web browser’s Internet Options.
Importing settings from IE is the only available option.
See Netsh Commands for Windows Hypertext Transfer
You can also use
netsh winhttp show proxy and
netsh winhttp reset proxy.
See How can I configure proxy settings for all apps, system, IE