How to activate XP in 2 easy steps:
Have some way of connecting to internet (cable/dsl/dial-up)
Click on Activate. The computer will connect via internet, or dial it's own toll-free number and activate. It will take about a minute.
Or, if you have no way of connecting to the internet (3 slightly more boring steps):
Write down a code given to you by the computer, 8 blocks of 6 characters, plus 1 block of 2 at the end.
Call the toll-free number and follow the instructions.
Type the confirmation code they give you back into the computer.
Congratulations, you have just activated Windows XP. See, now that wasn't too difficult was it!? 😉