How many paid licenses of Windows XP are currently in use globally?

This probably needs to be clarified a bit, due to the different
flavors of Windows XP that are available, specifically:  Windows XP
Home, Windows XP Professional, and Windows XP 63 bit edition.

The answer is probably best researched by going straight to the
authority:  Microsoft.

<a href="http://support.microsoft.com/contactus/">http://support.microsoft.com/contactus/</a>

Specifically, their public relations contacts may be of use:

<a href="http://www.microsoft.com/presspass/contactpr.asp">http://www.microsoft.com/presspass/contactpr.asp</a>

The firm handling PR for the XP operating system line of products is
Waggener Edstrom, in Portland and can be reached by phone at (503)
443-7000. This came from the above Press information link, but they
may be able to get you the information you require.

Of course, I meant *64* bit version.  you get the idea.