The Telegraph: “A well-known computer brand has disabled the printers of customers using ink cartridges from rival companies. Hewlett-Packard, or HP, has sparked fury after issuing a recent “firmware” update which blocks customers from using cheaper, non-HP ink cartridges in its printers. Customers’ devices were remotely updated in line with new terms which mean their printers will not work unless they are fitted with approved ink cartridges. It prevents customers from using any cartridges other than those fitted with an HP chip, which are often more expensive. If the customer tries to use a non-HP ink cartridge, the printer will refuse to print. HP printers used to display a warning when a “third-party” ink cartridge was inserted, but now printers will simply refuse to print altogether…”