Possibly, under the correct circumstances.
Normally, and assuming a retail license (Many factory-installed OEM
installations are BIOS-locked to a specific chipset and therefore are
*not* transferable to a new motherboard - check yours before starting, and
*ALL* OEM licenses are permanently bound to the first computer on which
they're installed.), unless the new motherboard is virtually identical
(same chipset, same IDE controllers, same BIOS version, etc.) to the one
on which the WinXP installation was originally performed, you'll need to
perform a repair (a.k.a. in-place upgrade) installation, at the very
least:
How to Perform an In-Place Upgrade of Windows XP
http://support.microsoft.com/directory/article.asp?ID=KB;EN-US;Q315341
Changing a Motherboard or Moving a Hard Drive with WinXP Installed
http://www.michaelstevenstech.com/moving_xp.html
The "why" is quite simple, really, and has nothing to do with
licensing issues, per se; it's a purely technical matter, at this point.
You've pulled the proverbial hardware rug out from under the OS. (If you
don't like -- or get -- the rug analogy, think of it as picking up a Cape
Cod style home and then setting it down onto a Ranch style foundation. It
just isn't going to fit.) WinXP, like Win2K before it, is not nearly as
"promiscuous" as Win9x when it comes to accepting any old hardware
configuration you throw at it. On installation it "tailors" itself to the
specific hardware found. This is one of the reasons that the entire
WinNT/2K/XP OS family is so much more stable than the Win9x group.
As always when undertaking such a significant change, back up any
important data before starting.
This will also probably require re-activation, unless you have a
Volume Licensed version of WinXP Pro installed. If it's been more than
120 days since you last activated that specific Product Key, you'll most
likely be able to activate via the Internet without problem. If it's been
less, you might have to make a 5 minute phone call.
--
Bruce Chambers
Help us help you:
They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety. ~Benjamin Franklin
Many people would rather die than think; in fact, most do. ~Bertrand
Russell
The philosopher has never killed any priests, whereas the priest has
killed a great many philosophers.
~ Denis Diderot