Win10 upgrade failure prompt 0x80072ee2 error reason and countermeasures

Cause analysis:
0x80072ee2 error code is caused by the server is not responding, please ensure that your network environment is updated under steady state, you also You can try changing the DNS address.
Response:
1. Log in to the computer with an administrator account.
2. Open “Control Panel”-“Network and Internet>-“Network and Sharing Center".
3. Click “Change Adapter Settings” in the left navigation bar.
4. Right-click on the current network connection (local or broadband connection) and select “Properties”.
5. Select <;Internet Protocol Version 4 (TCP/IPv4)", click “Properties”.
6. In the Open Internet Protocol Version 4 (TCP/IPv4) Properties window, select “Use the following DNS server> for manual setup.
7. In the preferred DNS server, enter: 4.2.2.1, enter in the alternate DNS server: 4.2.2.2.