I did a full reinstall when I went from AMD CPU to Intel CPU.
Had to call the Msoft activation line, had a new key within 10 mins.
retail you can change between PC's a much as you want as long as its activated on 1 PC only.
OEMs are tied to the mobo of the device you install it on to.
Ill give it a go first, i think my key is a OEM... so do i just ring microsoft and tell them ive got a new motherboard and need a new key?
Ill give it a go first, i think my key is a OEM... so do i just ring microsoft and tell them ive got a new motherboard and need a new key?
Its all kinda automatic (windows install will prompt you to phone for activation key) when you call up they will issue you with a key when you are prompted by the installer to enter the key, put in the one they give you over the phone. Then follow the prompts on screen. Its been a while since I last did it but I've carried over the same copy of Win7 to multiple new builds.