How to solve Win7 system time is not allowed

1, first click on the Win7 system in the lower right corner of the task bar on the time date, and then in the bounce out of the interface select click "Change Date and Time settings";

2, then in the bounce out in the date and time interface, switch to the Internet Time tab, and then click the Change Settings button;

3, then in the server's Drop-down button to select a server, generally select the time.windows.com option, and then click the Immediate Update button;

4, after the update will show the clock and server synchronization success, and then do not worry about the system time is not allowed