so i bought a system builders oem disk a month or 2 ago but i would like to add a core 2 duo instead of the pent d i have and to find out it cant handle it but i could upgrade the motherboard or would the windows i have installed on the hdd not recognize the new mobo would windows not accept it i don't know is a mobo upgrade possible somebody told me you can do this the system builder will but oem wont and they also told me that you can install a new mobo as long as the system builder is installed on one mobo at a time