I have a Toshiba L755 with Windows 7 Home Edition 64 bit with a 640 GB hard drive. I had a hard drive failure and had to replace the hard drive. I replaced the hard drive and went to use the restore discs to reinstall my OS and all of my Toshiba application and it will not complete the setup. I have 4 discs and after each disc it says to put in the next disc. I do this and when the 4th disc completes it continues to ask for another disc. I went the install process of the discs 6 times but it did no good. I ordered a second set of restore disc from Toshiba but I am still having the same issue. Can someone help me. I don't know what to do. It will allow me to install a copy of Windows 7 Home Edition and use the key on bottom of laptop but then I cannot get my original Toshiba apps back. I want to restore laptop to out of the box.