Josue Morales :
i had an intel setup and then i transferred to amd platform and i re installed windows and now if i do that again to switch with the msi mobo can i do that re installation and still keep my windows old from the first reinstallation and keep the seccond windows old
If you are changing out your motherboard, you will need to reinstall windows. If you install windows to a second hard drive, and if you are running windows 8, your computer can probably recognize and access your data from the older windows 8 install.
If you are trying to install a second install of windows to the same hard drive, I think the drive may need to be already partitioned; I'm not sure if you can create a partition on a drive with an active installation of windows.
If you are worried about losing your data, depending on how much you want to keep, your other option is to buy an external hard drive, they are pretty reasonable nowadays. It's not a bad idea to have one anyway in case your drive ever crashes.