Hello, I just purchased a VAIO laptop S series, I dont like windows 8. So I decided to pull the original HDD out and use my own SSD and install windows 7. I set the boot sequence to external boot, internal optical drive and internal hard disk already under windows 8. After I change to the SSD, laptop doesnt load the windows7 from my USB and screen always showed no OS installed, I cant access to the BIOS either... I think I should change some BIOS setting, need your guys help on this. thanks a million.