According to feedback from many netizens in the Reddit community, the Hewlett-Packard printer they used recently received an update and became unavailable after the update due to the use of third-party ink cartridges.

The chief cause of these printers that use third-party ink cartridges is HP's Dynamic Security function, which detects whether printers use original ink cartridges.

HP's official explanation for this function is: "Dynamic Security communicates with the printer through a security chip or electronic circuit on the ink cartridge." HP uses Dynamic Security to protect the quality of customer experience, maintain the integrity of our printing systems, and protect our intellectual property rights.

IT House learned from reports that Hewlett-Packard introduced Dynamic Security in some printers in 2016 and paid millions of dollars in a class action lawsuit in 2018.

Reddit community user grhhull wrote in the post: "HP has pushed updates for a number of printers to completely prevent users from using non-original ink cartridges. You cannot perform any printing tasks until you insert the original cartridge. After contacting Hewlett-Packard, the reply was caused by the recent update.