My emachine D620 notebook would'nt start up and kept coming up with PXE-E61: Media test failure and PXE-MOF: Exiting PXE Rom. Operating system not found. I was told that it was a faulty hardrive and have installed a brandnew one. I did'nt get a re-boot disc when i got the notebook. how do i restore it to working order. gratful for any help.cheers.