Greetings --

   Normally, and assuming a retail license (many OEM licenses are not
transferable to a new motherboard), 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

   As always when undertaking such a significant change, back up any
important data before starting.

   This will also 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

Select bootloging, vga mode, last known good configuration.  Whatever
I select, it just reposts and returns to that screen.  When I watch
the logging on the screen, it stops at the mup before it restarts.
What have I done wrong?  Thanks