^^ that will do your login secreen,
will put any pic/animation & or text you want in place of the windows starting @microsoft xxx and the pulsing windows
if you really want your system to look different get this http://bbosa.deviantart.com/art/XENOMORPH-W7-THEMES-201687720
now it used to be that it was a lot of ballache to ghet a full shell theme going but that one i linked has an exe file thatll do it all for you, sounds icons the lot,
if your not allready patched for custom themes heres an exe to do that too, http://universal-theme-patcher.en.softonic.com/
30 seconds and done
ps if you get an empty rar file for the theme try the mirror, links get broken over time on that site ive found, but they still dl?
any way happy modding