Re-activation problem

[Guest]

I bought a new Windows XP disk and installe it afew weeks ago.
Today when i booted up something came up about significant hardware changes
and asked me to re-activate Windows.
Every time I try re-activating it I get a message saying that the key is
invalid.
What is going on and how do I sort this out?
I've phoned cstomer support and haven't managed to get anything from it, the
time I was offered a new key I got the problem of my computer not being able
to start up and now that I can start it up they won't offer it to me anymore.

 

[RBot]

You should be able to call the phone activation center and activate it
using automated assistant. If this doesn't work, it will send you to
a real person. Don't tell them that you are asking for an activation
number for a second or third time, just say it's your first time.
This usually works for me.

 

[Guest]

Ok then thanks for that.
I called microsoft again and got myself a new key it's been activated and I
got it saved and written down

 

[RBot]

Congrats