page breaks

I have a HP windows 10. I use Word 2007. I can't remove the page break line. Have looked on internet and tried all suggestions, but nothing works. This problem just started in the last month

I am trying to add a page number series on the bottom of the pages and alternating headers at the top, odd and even pages, and to begin these on the third page of my document. I cannot get it to do this. The page numbering shanges when I try to add the alterning header, and none of it will...