I have a Toshiba laptop. A friend told me he had a virus so I formatted his machine and reinstalled windows using a flash drive I have with windows 7 on it. The problem came when it tried booting into the now installed windows. The laptop would go into PXE boot. I thought it was the hard drive so they bought a new hard drive for the machine. I plugged in the flash drive, created a partition, installed windows 7 and then when it came time to boot into windows, it did the same exact thing. When I hit f12 it just shows LAN, the dvd drive, and my flash drive. In the main screen in bios you see the connected hard drive but not in the boot section of BIOS. What am I doing wrong?