Hello guys I have a MSI 970A-G43 motherboard.Recentle I wanted to do a clear install of Windows 7 Ultimate right now i have Windows 8.1.So i go to the UEFI Firmware Setting and set the boot order so that CD/DVD be the first one to boot up I even disabled fast boot and after that i save it and restart my pc but nothing happens it goes straight to OS even that I disabled the fast boot my pc still boots up pretty fast a bit slower but nothing spectacular.Please help me!!!Thanks in advance