How do I remove the header/footer of some pages?

Use section breaks.

Place each part of your document that requires a different header/footer in separate sections, by adding "Next page" section-breaks (Page layout -> Breaks -> Section breaks -> Next page).

Then, for each section, insert header/footer. When editing header/footer, "de-click" the button "Link to previous" in the toolbar. That indicates that this header/footer will be different from the header/footer of the previous section. Then edit the header/footer, affecting only this section (possibly also the next ones, but not the previous). Do this for all sections.

Try this. I'm sure it will help. Remove Header or Footer from the Second Page of a Word 2007 Document

• Click on the first page of your document (within the body).

• Go to the Page Layout tab on the ribbon (third tab) and click on the tiny arrow in the lower right of the Page Setup group to expand it (see image).

  

• Click on the Layout tab (third tab).

• Check the “Different first page” checkbox.
• Ensure that the “Apply to” field is set to “This point Forward.”

• Click on OK.