Ever since the first days of Windows we have clicked on the X in the top right corner of a program to close that program or a file within that program. It has become a standard Windows practice that has even been copied by other operating systems. Not to say that Microsoft invented the idea but who knows for sure.
For some reason in Word 2010 they decided to take away the X on the top right corner of the document (not Word itself) so you have to either close the whole program itself or go to File and then close to close the document. You may have noticed that when trying to close a document in Word 2010 without closing Word itself that there is no close document X button where it should be. Now you either have to close Word itself or go to File and Close to close the document while leaving Word open. Here we will show you hot to restore the X on the document itself so you can close it right from there instead of going to the File menu.
Before the fix
After the fix
For Word 2010 click on the File tab, then click on Options and then Advanced and scroll to the Display section.
For Word 2007 click on the Office ball and then on the Word Options button. Then click on Advanced and scroll to the Display section.
Under Display find and uncheck the box that says Show all windows in the Taskbar and click Ok. Now you will have your close document button back!
Keep in mind that changing this setting will prevent your Word documents from showing up in the Taskbar as separate entries when you have multiple Word documents open like they used to as shown below. This is assuming you use the never combine option for your taskbar button settings under Taskbar properties.
Change Your Default Open and Save Location For Office 2007 and 2010 Programs
How to Turn Off Protected View in Office 2010
Variations Between Office 2010, 2007 and 2003
Customizing the Quick Access Toolbar in Word 2007