A friend of mine asked me to clean up his laptop because it was running rather slowly. After checking a few things it became obvious that the harddrive was failing. I fitted a new harddrive but couldn't get the machine to boot from either the DVD drive or a bootable USB stick. In the DVD drive I tried a Windows OS disk and Toshiba recovery software. I tried a Google search and it seems that lots of people are having the same problem and the general consensus of opinion seemed to be the only way you could reinstall the OS was via the recovery partition on the harddrive or if you had fitted a new harddrive due to failure or upgrade, best of luck with that because somehow Toshiba had disabled that option in the BIOS and no amount of fiddling in the BIOS settings would get it to boot from the selected source, be it DVD or USB. Not one to give up easily I thought back a few years to when I had a similar problem with a machine (can't remember what machine it was) and the solution is quite simple. Connect the new harddrive into a spare desktop machine as the primary drive, using a Windows install disk, or in my case a bootable USB stick with the iso installed and start the installation process. When you reach the second restart which is just before you put the installation key in, switch the machine off as it shuts down thus not allowing it to start up again. Move the new harddrive back to the laptop and make sure the installation media is either in the laptop DVD drive or the USB stick is plugged into the laptop. When you boot up the laptop Windows will continue with the installation as if nothing has changed and then present you with the CD/DVD installation key screen. I believe it is at this point that Windows goes back to the installation media to get all the drivers it needs for the installed hardware. Don't forget the move the installation disk/usb stick.