OK, I have this Asus laptop that came with no hhd from a auction. I installed a hard drive and it booted up first time, so I updated the bios and all drivers but I noticed that every now and then it will not boot it stays at a black screen and reads that I need to install boot media and then press a key to reboot. I made sure that bios was configured right but still would do this about 25% of the time I would start computer. This morning it will not boot past this screen, I went in to and made sure that boot order was ok and the HHD doesn't show up in Bios now. The hard drive works cause I checked it in another machine. I put in the Windows 7 disk and ran the check boot fix and it says there's an aeir and it cant be run. I try to install a fresh copy of Windows and it says it cant. Any ideas would be great ,THANKS!!