my mother board died and I was rockin an oem windows 7. Now the os won't boot with my new motherboard cause it's oem. So I got a copy of windows 7 64 bit pro, will installing it erase all of my current data?
Try making an empty partition with the free Partition wizard. See if you can install windows on the empty partition. Or save all the data that you do not want to lose then install windows on the drive.