If you do not need to use a proxy to connect to internet then try to select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly. See "Firefox connection settings":

Configure WinINET proxy server with PowerShell - Working Mar 06, 2020 Proxy Server is not Responding [Solved] - Virus, Spyware Oct 29, 2014

Jun 24, 2011 · In the Control Panel-Internet Properties-Connections-Lan Settings- My Proxy Server is checked and under the Advance setting there is a Proxy address both HTTP and a Secure. When I delete the address - Port and uncheck the Proxy Server Box and then Check the Automatically Check settings Box Network & Sharing: Proxy server help.

Jun 23, 2020

Sep 18, 2015 · How to fix Computer appears to be correctly configured but the device or resource is not responding - Duration: 2:46. Iviewgle 136,550 views

Nov 25, 2014 · The proxy server isn't responding: check your proxy settings 127.0.0.1:8877 Jump to solution I shut down my laptop one evening and when i turned it on and tried to get back online i got the message i typed above. it sugested i go to tools> Internet options > Connections. Jun 10, 2020 · The proxy server then makes your web request on your behalf, collects the response from the web server, and forwards you the web page data so you can see the page in your browser. When the proxy server forwards your web requests, it can make changes to the data you send and still get you the information that you expect to see.