Im using Pro, and I went to AT home page and saved an animated GIF, I clicked on Save AS, and the options were GIF, or BMP. Do you have Microsoft Image Editor set as the default program to open GIF set in the place I directed you too? When I opened the GIF from my pictures the Picture and Fax Viewer was the program that opened the GIF< and it was fully animated. If Photo Editor opens it then it is only a still pic. OK, on my system Photo Editor is part of my MS OFFICE Tools. I would have to start out with a fresh install of XP to tell you more. I have a bunch of image programs on my system.
ACDSEE is a great little image program for many uses, as is Irfanview