I have managed to find an W7 ISO image at the Microsoft site and been able to restart the system with a new disk.  Here it is: answers.microsoft.com/.../7d964b05-2be9-4800-bc7f-3ca30356fc3d You will also need imgburn or similar to create the boot files from the iso file and burn them to a DVD.
Does anyone know where I can find/download the windows 7 boot image?I was told that I could get it.  My HDD died and I need a new disk. Thanks  
Windows 7 boot image