Re-installed Win7 from USB using Rufus on a friends Sony Vaio and everything went fine, except the network adapters didnt show up. So after hours of trying to figure it out I tried to re-install windows again but kept getting error message "Cannot install windows on this drive". Did the cmd disk clean but after cleaning Disk the computer shut down and now I can't boot from USB, get the "Operating System Not Found" error message. I can get into Bios but nothing else. I am at a loss, any advice would be really appreciated.