Why does MS Word 'Update index' ask for confirmation? [closed]

1. How do you update an existing index in Word?
2. Why can't I update a field in Word?
3. How do I stop Word from automatically updating fields?

How do you update an existing index in Word?

To update the index, click the index, and then press F9. Or click Update Index in the Index group on the References tab.

Why can't I update a field in Word?

Click the Microsoft Office Button, and then click Word Options. Click Display. Click to select the Update fields before printing check box, and then click OK.

How do I stop Word from automatically updating fields?

The only way to stop Word from updating fields is to lock them. You can do this by selecting the entire document (Ctrl+A) and then pressing Ctrl+F11. The fields will then remain locked until you specifically unlock them by selecting the entire document and pressing Ctrl+Shift+F11.