That is your boot manager - how you getting into that?? You need to F10 to get into the bios settings - and change the boot order to your setup media first..
Why are you downloading from a torrent? I wouldn't touch one with an "activator" with a ten foot pole, god knows what else has been done to it. You can get official clean unmodified install media here, Create installation media for Windows 8.1 - Windows Help That install media will accept Windows 8.0 and 8.1 keys, even embedded OEM keys. You already have a product code, right?
there was problem with bios options and the service center guy just made it fine now its working all good
one more thing is there anyone who can help me to install mac os on hp laptop
no i dont have product key. actually the laptop is imported and hprecovery hard disk is formated and hp care centre they r not sending cds so i dun have it, i have downloaded windows 8.1 pro as u said sir