Option 1: Try clean Boot and see if possible 3rd party program could be causing this: From the desktop:  Press the Windows key +R In the Run box type msconfig and hit enter  Under the Services  tab, place a check in Hide all Microsoft services and hit Disable all  Open Task Manager Under the Startup tab right-click and disable each Startup item and then close Task Manager Click Apply/OK  Restart If you have connection now try find out which software caused this, try to reinstall it etc.. If the issues persist even after clean boot, that could be firewall   Option 2: Press the Windows key +R In the Run box type  “cmd” to get the “Command Prompt”. (better to run it as an admin) type netsh winsock reset and run type netsh advfirewall reset and run   Restart  Press Windows key + C, click on the search button, type firewall then click on Settings. At left click on allow an app through internet firewall, click on change settings then add apps you're having trouble with. Hit OK to apply changes made.   Hope it works for u.    
Dear all, I have a serious problem. I upgrade my Laptop (DELL Inspiron 3521) from Windows 8 to Windows 8.1. The upgrade finished and all seemed to work fine but when I went in Desktop Mode I noticed that I cannot open web pages from all browsers (IE, Mozilla, Chrome). Also I noticed that some programs when I press to check for updates they are saying that there is no connection to the internet or check the firewall. I search the internet and I found that maybe the problem is the antivirus, so I completely uninstall the ESET but with no result. I have to say that in METRO Mode the internet is working fine. Please give me a solution the soonest possible:emotion-12:. Thanks in advance Elias Kekakos
No internet connection after upgrade to WIN 8.1