As far as I m concern if u r asking about just buying the windows 8 operating system then you can buy it on microsoft's website or you can just go to nearer authorized store from whom you can have licence version...
Please help me in finding following parts whichs suites best to my purpose
Motherboard
Soundcard
Graphics Card
RAM
Audio Devices
I can maximum invest 60000/- India Rupees.
Please suggest me the best possible configuration here...