Greetings --
If you have to ask, you're almost definitely running the 32-bit
version of WinXP. (I'm not trying to be facetious; I'm sure you'd
have noticed paying several thousand dollars more for the Itanium or
Itanium II CPU required to run the 64-bit version of WinXP Pro.)
There is no 64-bit version of WinXP Home.
Windows XP 64-Bit Edition Overview
http://www.microsoft.com/windowsxp/64bit/overview.asp
To verify for yourself, Click Start > Run, type in "Winver" and
press <Enter>. If the resulting dialog box does not _explicitly_
state that you have "Windows XP 64-Bit Edition," then you have a
32-bit OS.
Bruce Chambers
--
Help us help you:
You can have peace. Or you can have freedom. Don't ever count on
having both at once. -- RAH