Using XP on two computers

u cant. u have to buy another XP or buy the permission
from microsoft
-----Original Message-----
I have XP on my PC, kids PC had error screen for all
icons
(Explorer Error) wouldn't even open MY COMPUTER. They
were
running on Windows 98, cannot find disc. Loaded XP into
their PC and working great but has 30 day period to
registor. Can I run my XP on both of my PC's or and
how?
Or have I permitted some MICROSOFT CRIME by loading the
program into both of my computers. How can I run on both
without buying another program. Thank you.
.