Rather than using an external application to take screenshots, Office offers its own screen-capture tool.
Open the application from which you want to take a screenshot.
Open the Office document where you want to place the screenshot.
On the Insert tab, click the Screenshot button.
Click Screen Clipping.
Tip
Insert the Entire Window If you want to insert a screenshot of the entire window, select that window from the list that displays.
Select the area you want to include in your document using your mouse pointer (which now appears as a crosshair).
Release the mouse to insert the screenshot.
Note
Screen Clippings Selecting Screen Clipping minimizes your Office application and displays other open applications and the desktop with a white semi-transparent layer.