When you buy a computer, you receive an operating system pre-installed. The terms of licensing for Windows is that the 'OEM' version (the one used by the builders of PCs) is designed only to be used on that computer, no other.
With this in mind, Microsoft decided to stop providing full Windows CDs that could easily be used to install Windows on any other computer. The options are that either you get no copy at all, or the builder of the computer creates a hidden partition on the hard disk and stores the files there, using a boot disk to allow you to access it.
With Packard Bell, you have the hidden partition and a red floppy disk to let you restore the computer. They also come with SmartRestore and ActivDoc which let you access the hidden partition. If you like, you can even make a backup on CDs of all the informationstored there - it takes about four CDRs but means you have a backup in the rare case of a hard disk failure.