These are startup screens for WindowsXP.
They are made specifically to work with a free program called BootSkin.
BootSkin.com

Sailor Chibi Chibi Sailor Chibi-Moon Sailor Jupiter Sailor Mars
Sailor Mercury Eternal Sailor Moon Sailor Neptune Sailor Pluto
Sailor Saturn Sailor Starlights Tuxedo Kamen Sailor Uranus
Sailor Venus