Windows XP PRO doesn't accept original OEM key

I think an easier way would be to get a keygen (like listed before) to install windows, then change it during activation. If you can't change during activation then you should use something like this:

http://www.astalavista.com//data/rockxp.exe

you can find xpsp2 keygen "keygen.us"

but

thx

LaDidi or Experts in here,

Why is there a need to break them into 3 parts since the sum of each hex-byte of the string will produce the last byte as checksum??

Where/which articles did you manage to lookup on this 'special' info from?? There're lots regarding PID only..

I did a check for Win2k3 and it's true that by summing each hex-byte together will produce the last byte as a checksum..

Btw, the main question: What's/Where's this ExtraData use for??

I found that it's different for different type of the same release such as SC, TC and Eng are diff in value..

I was wondering if that string has any relation with the product key/id.