Are you using the "Print Screen" Key?
To copy the window or screen contents
To make a copy of the active window, press ALT+PRINT SCREEN.
To copy the entire screen as it appears on your monitor, press PRINT SCREEN.
To paste the image into a document, click the Edit menu in the document window, and then click Paste.
Make sure MS word is open first, make sure "paste" is darkened in drop down menu.