: If your laptop came with software for creating recovery disks, use that. Typically, this involves burning a set of disks from the recovery partition. The process can vary, so refer to your user manual or the manufacturer's website for specific instructions.
Since the Packard Bell dot s does not have an internal CD/DVD drive, you must turn the downloaded ISO into a bootable USB drive.
You have found a and downloaded the file. Now what? You cannot just copy it to a USB stick. You must "burn" it properly.