Hi, I tried to install windows 7 home premium 64 bit with usb, but the installer shows "No device drivers were found. Make Sure That the installation media contains the correct drivers, and then click ok" and next shows "" A required CD / DVD drive device driver is missing. If you have a driver floppy disk, CD, DVD, or USB flash drive, please insert it now. Note: If the Windows installation media is in the CD / DVD drive, you can safely remove it for this step. "<Browse> <OK> <Cancel>" What should I do? Motherboard: Asrock B85 PRO 4