How to close the operation center message prompt

popped up in the lower right corner of Win7 Method 1 Close the current message prompt
In the pop-up "Action Center" in the "Open Action Center":

Click to open “Operation Center”On the right side of "Maintenance":

Click on the message that appears below "Close the message about ‘Windows Backup & rsquo;> This link:

This time "Backup" message becomes "Open the message about Windows backup", as shown below:

Method 2 Close all messages at once.
Because WIN7 message prompts a lot, So we need to close all the message prompts.
Right-click on the "Custom Task Icon" button on the "Operation Center", select "Open Operation Center" link:

Click to open "Operation Center" Corner "Change Action Center Settings" ":

Cancel “Open or close all the boxes in the message":

Click on the button to confirm the ” Close all the tips for the "Operation Center".