working."

This has been going on for a month. Evrytime I open up FireFox or Internet Exploer it says the same thing. Firefox is configured to use a proxy server that is refusing connections. * Check the proxy settings to make sure that they are correct. * Contact your network administrator to make sure the proxy server is working." So I go into Advance Network settings and change the proxy to "No Proxy" or "Automatic URL configuration". But it does not stay permanent. Every time I close out of Firefox it resets the proxy so the next time i get on I have to redo it, like if it never remembers the change. Because of this issue nothing can update and I can not play any of my games. I have thought to go to the computer store to get it fixed, but if its due to the last update before I more or less have to pay for some one else mistake . So if anyone can tell me how to fix this I will be greatly appreciated.