Hey Maxnak4,
there is no procedure to unregister any of the Microsoft products because M$
hasn't got the technology ready to cope with billions of people doing this
almost daily.
You simply install your product on the new system and if activation is
required, you have to first try it online and if this fails, you will need
to use the telephone method. You get the toll-free number on the screen so
it doesn't cost a dime.
The old machine, assuming it is still in working order, can continue using
the M$ products. Quite handy if Peter Foldes' sister manager to still it
from you.
Hope this helps.