hard drive makes an unusual sound and doesn't load windows,
Hard drive faulty
PXE-61 Media Failure, no operating system found means it cant find windows on a network either.
Boot from CD needs to be set in BIOS as first boot device but cannot load files to the HDD so will not boot anyway.
Remove and refit the drive to remake connections but if its making bad noises then I'm afaraid your looking at a new drive and a reinstall of windows from your DVD hope you have the serial key and its not rubbed off the sticker.