|Your recovery partition is for this. If you cannot access then check your manual for details. If you are trying to use it as I first assumed then you need to see if your BIOS will allow you to boot from an external USB device, if it can then you will need to purchase an external DVD drive to use the recovery disk set.|
You also can be getting these errors (and probably the ones that made you think you needed to return to factory install) due to a bad memory stick. Run Memtest to test your memory for errors. I believe that there is a version that you can use to make a bootable USB flash drive if you can boot to USB devices or if you are purchasing a DVD drive anyway just make a bootable CD from the ISO image they offer.
If you have two sticks of memory then you can see if it works with one and then the other, but memtest is a more reliable test. If either test indicates you have bad memory, replace both with a matched set of the correct type before attempting the restore again.
You have to be a little bit crazy to keep you from going insane.