Raspberry Pi 3 and built in Wifi - Boot Issue

Hi All,

I am a newbie to Raspberry Pi . I have Pirate box installed on Tp Link 3020 and it works like a charm. I have bought a Raspberry Pi 3 to try out the same. In the DIY USB Wi-Fi Adapter is added in "Stuff you will need". But Raspi 3 has an inbuilt already. Do I still have to buy a new external Wifi Adapter ?? .

I just went along with the installation without an external Wifi Adapter but Raspi dint boot.. I thought I have got a defective product. But i am able to boot NOOBS and do everything.

Could somebody please let me know how do i do it for Raspi 3 ?

Hoping for a quick response.

Regards,
Imran