Windows XP PRO doesn't accept original OEM key

[LaDidi]

Yes. It's easier to use a keygen.
But it's also funny to understand how the things work ?

QQQQQ is fonction of the time (ie HH:MM) not very interesting.

ExtraData
for example : 617466716E636E6A756D9A251AC0D0
You split in 3 parts
617466716E636E6A756D 9A251AC0 D0
the first part is (in ASCII) "atfqncnjum" DON'T KNOW WHAT IT MEANS
the second part is : 9A251AC0 DON'T KNOW WHAT IT MEANS
the third part is : D0
The sum of each ExtraData is 0x5D0 (so 0xD0 is a sumcheck)