OS question

[TapeDeck]

THE STORY:

I have Windows XP MCE installed on this machine, but I never use it because I use 7.  I have an extra PC laying around that has 2000 on it and I want to upgrade.  I don't want to wipe the XP off of this machine in case I can't buy 7 when I comes out or 7 breaks. 

THE QUESTION:

Can I install XP on the 2000 machine and register it without removing it from the this computer?

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[n0cturni]

If you plan on using the same XP key, you're going to have to buy a new copy.

You may as well just be buying Windows 7 when it comes out at that point.

[TapeDeck]

But I'm pretty sure you can transfer the key (correct me if I'm wrong), I just want to know if I have to uninstall the original first.

[n0cturni]

Yes.

[Jsk2003]

I don't see any reason to have to uninstall the first one.