Going from an AMD platform to Intel is big. The drivers currently installed in windows will most likely not work, as you just experienced. A repair install may fix it, but generally a clean install is recommended.
The system drivers you need came on a disk with the new motherboard. You may need to delete the current windows 7 partition in order to clean install or at least format it.
If you can't get a CD/DVD to work, try making a bootable flash drive using your ISO and install from flash drive.