Do you still a windows xp user? do you want to transform your windows to windows8 by your self? if yes our best friends PeterRollar create a Win8.1 Transformation pack for those who still use XP. The most similar Win 8 imitation you can find on the web.
Segoe WP fonts have to be installed on your system for proper appearance.
Give it a try.
All screenshots Windows XP SP3