Would post mine but I'm running bootcamp so it always says that I have fake windows ( I DONT!! D:)..and every time i put on a background it turns to blackness ;-; and blackness isnt good for sharing.. (totally black background except for words saying 'this windows isnt real' (lies!) and my icons..
Are you running XP on Bootcamp?
There's a way to remove blackness and "non-genuine" mark by
booting Windows in safe mode, deleting few files and editing Registry.
But you must very well know what are you doing, or you will ruin OS.
Also be aware that the thing is illegal in US and few other countries.
If you do, then look for "how to remove WGA" on Google.