Microsoft Security Essentials and Genuine Windows XP on SP3 bootable CD

[System]

Actually this is a problem on my latest question
Unable To Boot Into Dekstop Windows XP SP1 Home Edition

After all the installation,
and the latest updates after the os installation,
i get message,
my Windows XP SP3 not genuine
i tried to go to microsoft link givin on that resolving the problem thing about genuine
and the sites says, it didnt exist anymore xp sp3 genuine validation,

I didnt give up,
I am tried to searching to finding the genuine_activation on google
I registry it on my laptop,
Yeah it worked and i can install MSE on my laptop based now XP SP3 Professional
At here the bad problem was,
it ignored the wireless devices

When i rebooting (restart),
The WGA and MSE ignored the genuine_activation that i registry before,
So i had to registry again,
Not only that it seems using that registry making my laptop had a slow performance than usual,

I recommended to using Microsoft Security Essentials on the latest help,
But i cant, because of not genuine windows product,
Please help, i wanna install MSE and running to protect my system,
And at least givin my laptop great performance and great protection,

Sorry to hoping so much, its because i am already tired with reformatting windows, installing again,
I am afraid if MSE didnt installed, my laptop didnt had a good performance,
Thanks for reading and any help i will appreciate it.

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