Get a bunch of cheap USB drives and flash LiveCD image on them. Use ISO format image if possible, as most systems treat those as read-only, even if they are on

Get a bunch of cheap USB drives and flash LiveCD image on them. Use ISO format image if possible, as most systems treat those as read-only, even if they are on r/w drive. Tape a drive inside each computer's case, and you now have instant recovery. For more advanced approach, get a device with physical "read only" switch, load a recovery image, set to R/O, and permanently connect to internal USB/IDE/SATA port. You'll have to disable it in your main OS, but boot menu will show it. If you choose the good image, you'll get much more that BASIC of old: programming languages, graphical calculator, disk formater, and lots of other cool stuff.