I have been using windows 8 for the past few days but suddenly since a couple of days am nit able to use my app store as it is facing some problem. every time i try to open it, it says that my system has to be connected to internet to use the store even though my computer is connected to the internet and it is working too please help. This is the message that is shown when i open my app store: "your PC isn't connected to the internet. To use the store connect to internet and try again"