Insert a section break between pages 3 and 4.
In Word 2003 or earlier, click View > Header, and the Header & Footer
toolbar appears. Put the cursor in the Section 2 header. Click the Format
Page Number button on the toolbar, and set the Start At value to 1.
In Word 2007, right-click the header in Section 2 and choose Edit Header.
The Header & Footer Tools riboon appears. Click the Page Number button and
choose Format Page Number. Set the Start At value to 1.
