Depends. Was Office XP OEM (i.e. did it come with the old computer)? If so,
that's it for that licence, I'm afraid - the system dies, the licence dies
too. If it's retail, then just install and activate by phone.
Please note that the reply address is fake.
Keep all posts to the groups as private requests for assistance
(i.e. email/IM) cannot be acknowledged. Thank you.
You'll need to provide more details of your situation if you are looking for
some assistance with installation. For example, did the license come
pre-installed on yoru old PC? What version of Office XP are you using? Do
you have the installation CDs? What operating system are you running?