How to rollback in windows 7 "preparing your computer for first use" stage ?

Hi There,

I have bought a laptop with winodws 7 OS a day ago and opened it to set it up for the fitst time. Once I power on the system and setup my username, I found out that there is problem with LED screen and I have to return the product back and exchange with new one.

Now, I need to know how I can edit the registry to set back the windows to the stage that ask again to "prepare the computer for the first time". it's like when I power on again it should ask again to setup the windows.

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Kruno DžoićSystem EngineerCommented:
use sysprep

Specialize. Choose this configuration pass if your Sysprep provider needs to perform actions that will re-initialize your application after the Windows installation has been transferred to a new computer. For example, if you have installed new hardware or if this is the first boot of the computer for a new user.

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Miguel Angel Perez MuñozCommented:
A tool called sysprep do it. The problem is the key used to setup machine and make and answer file. Why you need to reset computer to this state? I supposed that is not a software problem.
Kruno DžoićSystem EngineerCommented:
or maybe your laptop have a button like this

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