I know on a HP you can restore to factory settings in system tools...is there n e way to do it without a cd on a diffrent computer...formatting c is not an option!!!!!!
The restore to factory settings uses a disk image that is located on a separate(sometimes hidden) partition on the hard drive. You'll need to find out if this different computer has such a factory image.
Alternatively, depending on which version of Windows you are using, you may be able to use System Restore to recover.