Hello, I'm new to all this, but I have a Toshiba Satellite L675D-S7104 that's just a little over a year old. The hard drive in this particular device decided to give out on me so I was forced to have a friend replace it with a slightly smaller hard drive (~160 GB) that had no operating system on it. I then downloaded a copy of Windows 7 Home Premium onto my old laptop, burned it onto a disk, and booted up my Toshiba from the burned disk both by changing the bios and by selecting to boot from disk at the Toshiba start screen. However, when I boot from the disk all I get is a black screen with just one blinking underscore in the top left corner. I would love to know how to remedy this, as I have spent a vast amount of time trying to make this work. Thank you very much and have a nice day.