When you select the Slice tool (or press K) in Photoshop 7, it enables View->Extras and View->Show->Slices. Two small rectangles appear in the upper left corner of the image. One shows "01" and the other shows a sliced image. That becomes the default view every time you open Photoshop. To hide this by default, first uncheck View->Show->Slices and than View->Extras.