jetzofly :
I'm building a new PC but my current PC already has Windows 8, will I need to re buy it or is there a way to transfer it onto my new PC?
First - 1 license, 1 PC. You can't use it on two PC's.
Second - If that was an OEM instal....like Dell/HP/Alienware....that license is tied to that original motherboard
Third - Be very, very careful of where you purchase from. If it is significantly cheaper than Amazon/Newegg/TigerDirect...it is probably not legit.
Most of the random 'key only' sites are like this.
Someone buys in bulk, with possibly a stolen credit card. Or buys academic/MSDN/TechNet licenses. And then provides these to a website for sale. None of which are valid for resale.
These have been known to become unauthorized.
Question: Where did the install on your current PC come from? Preinstalled, or something you bought and installed?