What if the win8 app store can't open?

There are a lot of good software in the app store of win8. As long as we register Microsoft account, we can download many programs for free. It can be said that it is very convenient. Recently, many friends have encountered win8 app store. If you don't open, the following Pepsi grid will tell you about the solution.
What should I do if the win8 app store doesn't open?

1. First let our computer connect to the network, then click Network and Sharing Center--Network Link--Change Device Settings--Local Link--(TCP/IPV4)--Property Modify DNS to provide Google Free DNS: 8.8.8.8 and 8.8.4.4.
What should I do if the win8 app store doesn't open?

2, window key +X key combination to bring up the system shortcut menu, select command prompt (admin), then enter netsh Enter, continue to enter winhttp Enter, then enter import proxy source=ie Enter, then restart The computer can be.
What should I do if the win8 app store doesn't open?

3. Turn off the network firewall in the control panel.
What should I do if the win8 app store doesn't open?

4. Right-click on the computer---Properties---Device Manager--- NIC driver, then try to change the speed and duplex value of the NIC.
What should I do if the win8 app store doesn't open?