Today I thought I should take care of this long pending issue of Network icon in the system tray showing a red x even though the internet is working and it is connected.
![red x on network red x on network](/wp-content/uploads/2012/12/red-x-on-network_thumb.jpg)
After googling for some time regarding this issue, I discovered that uninstalling Oracle VM virtual box has helped people in this case. That reminded me that I did install virtaulbox when I was trying to make a virtual Xen server which was possible on Oracle VM virtual box.
![uninstall virtual box uninstall virtual box](/wp-content/uploads/2012/12/uninstall-virtual-box_thumb.jpg)
Without waiting any longer, I uninstalled Oracle VM virtual box as it was not being used any longer and BANG! the red x mark disappeared immediately.
![red x gone red x gone](/wp-content/uploads/2012/12/red-x-gone_thumb.jpg)
So the suggested resolution worked like a charm. Thanks google!!