What to do if you can't activate after upgrading Win8.1

I believe that many netizens have encountered this kind of problem. After upgrading Win8 to Win8.1, it is found that Win8.1 cannot be activated. What is going on? In fact, this situation is generally caused by network problems. Because win8.1 activation requires access to Microsoft servers, and currently in some places in the country are blocking Microsoft servers, so it will bring problems that cannot be activated. Let's take a look at how to solve such problems.

First, change computer
DNS address

1, first open “ open network and sharing center”.

2, then click on the left side of the "Network and Sharing Center" window to change the adapter settings & rdquo;, as shown below:

3, then In the “Network Connections” window, find the network card we use for Internet connection. Generally, it is displayed as “Local Connection”. My network card name was changed to “Wi-Fi” in the past.

So select the network card and right click with the mouse, select “property", as shown below:

4, "Network" in the network connection properties of the show later In the tab, find the option "TCP/IPv4", and then click the "Properties" button at the bottom right, as shown below:

5, Next, in the "Internet Protocol" In the Version 4 TCP/IPv4 <; Properties window, select “Use the following DNS server address", and then fill in the "First DNS server" and "Prepare

Select DNS server" Good DNS address. Here is the place to modify the DNS address, we change the DNS address to 8.8.4.4, and then click OK at the bottom.

6, after the completion of the above DNS address changes, we could activate win8.1 can be found can be successfully activated, as shown below:

Note: DNS Address 8.8.4.4 is Google's global DNS address. After changing the DNS address, the network speed is not as fast as before. It is recommended that after the activation of win8.1, the DNS will be restored to its original state and changed to automatic acquisition.