The Steam Support has already replied to me and it is now solved.Heres the response to help anyone with the same issue:"Exit Steam.Click Start > Run (or Windows Key + R)Type inetcpl.cpl and click OK.Click the Connections tab.Click the LAN settings button.Note: You may want to write down the settings currently found in this window if you need to undo these steps later.If any items on this window are checked, uncheck them.Click OK to close any open windows and restart your computer.Now, launch Steam and test the issue."Hope it helps.
