Hi.

When i write the serial number in unattended mode and install a copy of Windows Xp with sp3, installation is block because say the serial number is not correct.
Why?
My windows xp professional is original and s/n is correct)

Thanks

mscals,
We need to know more of what you are doing. Please attach (not paste) your LastSession.ini file.
Thanks, John.

i do it

Thanks

ps: CDkey i not present (i remove it) but is correct.

mscals,
I see nothing obvious. It is really a minimum nLite process. The one question I have is are you trying to integrate SP3 into a source that already has SP3? You need to start with a fresh copy of your source each nLite session. I copied my CD contents into a folder and make a copy of this folder before I start nLite.
Are you using a virtual system to test? If not, please consider VirtualBox (Sun), VirtualPC (MS) or VMware Server. They are all free. I use VMware Server because it was the only one at the time to support XP x64 (which I run). It is much larger than the other two (perhaps 10 times) so consider the others first. I have used neither, but you should be able to get some advice in these forums.
Enjoy, John.