Hey guys, I know there is a million posts out there on this same topic, but not one explains in detail what to do if you do not have the CD/DVD that came with the PC. I have a Toshiba Satellite A505 running Windows 7 on Intel Core 2 Duo. I had partitioned my 500 GB hard drive and installed Ubuntu 10.10 on 95 GB. After a few months I stopped using Ubuntu and decided to delete the partition using Windows Disk Management. The moment I restarted the computer the famous "error: no such partition. grub rescue" pops up. I was getting ready to reset my computer to factory settings. I have misplaced the CD/DVD that came with the PC. How can I reset my computer to factory settings without the CD/DVD that originally came with the PC.