You cannot use an operating system from on e PC on anoter PC unless it has an identical specification. You will need to reinstall Windows before you go any further. You iwll also probably have to reinstall most of your other programs as well. You might get away with resetting your BIOS - you need to press a key during the POST process - your POST screen will tell you what to do, but thast is just the start of your problems. Later on the software will find a load of different hardware on the new motherboard and have to install all that's necessary for that. It might work, but the system will be very lethargic if it works at all.