My question is a "what if" scenario. What happens if one's motherboard gets
fried (dies) and you have WinXP home standard installed on your hard drive
(assuming your hard drive survives)? Does XP recognize that your copy of XP
is valid even with the new hardware change or do you have to
"re-install/repair" the OS? Does the OS become invalid with such a scenario
even though you are the registered owner of the purchased OS?
First, note that there is perhaps a difference, depending on whether
yours is a retail copy of Windows or an OEM copy.
First the retail copy: Yes, your license remains valid. You can change
motherboard and even the entire computer as many times and as often as
you want to.
Normally, a Repair installation, and then reactivation, is all you
need to do. It's a rare occurrence, but occasionally the differences
between the two motherboards are severe enough that a repair
installation doesn't work, and a complete clean installation is
required.
With an OEM copy of Windows, the technical side of what to do remains
the same, but there's a potential licensing issue to be aware of. It's
a can of worms, as far as I'm concerned. The OEM EULA states that
the license is valid only for the original computer it's installed on,
and it may never be moved to another.
The problem is that the Microsoft OEM EULA does not precisely define
exactly what constitutes the "computer." Some people claim that the
motherboard constitutes the computer. However logical that might seem,
the EULA does not state that, and the EULA is the document that
defines the rights of both parties to the agreement.
Some of those people point to a web site for System Builders, where
Microsoft defines the computer as the motherboard. However it's not
what it says on some web site that defines the customer's rights, it's
the EULA; besides, that web site is not even available to the general
public. I'm not a lawyer, but my guess is that if it ever came to a
court case and someone cited that web site, he'd be laughed out of
court.
So, can you replace a motherboard, consider the result the same
computer, and reuse your OEM copy of Windows? Regardless of what I
think, you think, or anyone else thinks, or even what a court might
rule if it came to that, the real issue is whether Microsoft will
permit you to reactivate if you do. Unfortunately the answer is again
not clear-cut, and we have heard here from people who have had both
experiences--some were reactivated and others were not. If they refuse
to reactivate you and you take them to court, you might win, but who
of us would be willing to undergo that trouble and expense to find
out?
So the answer, with an OEM version, is that there is no real answer.