A family of Microsoft word processing software products for creating web, email, and print documents.
"Link to previous" is actually a red herring in this case, since headers/footers don't need to be unlinked to restart page numbering. What you do need is to have "Continue from previous section" selected in the Page Number Format dialog for every section in the document, including sections that may begin and end in the middle of a page (and consequently have no associated header or footer). It is helpful to add the Section Number display to your status bar so you can keep track of what section the insertion point is in. Then go through the document one section at a time* and use Insert | Header & Footer | Page Numbers | Format Page Numbers... to get to the Page Number Format dialog.
*In Word 2010, you can easily skip from one section to the next (or previous) by setting the Browse Object to Browse by Section. The Select Browse Object button is the round one between the double arrows at the bottom of the vertical scroll bar. Once you have selection "section" as the browse object, you can use the up and down arrows to move through the sections.