Downgrading the HP OfficeJet Pro 8620 firmware is a common method to bypass "Dynamic Security" locks that prevent the use of third-party ink cartridges. Because HP often removes older firmware from its official site, you will typically need to source the downgrade file from community archives or third-party providers. HP Support Community Step 1: Disable Automatic Updates
Final thoughts Downgrading firmware isn’t for everyone — it’s a last-resort tool when a recent update harms your daily experience and other fixes fail. It restored my OfficeJet Pro 8620’s previous snappiness and fixed the AirPrint flakiness, but it also required patience and care. If you go down this path: document every step, keep backups of settings, and be prepared to restore to the latest firmware if you hit unexpected issues. hp officejet pro 8620 firmware downgrade new
Windows or Mac PC: Most downgrade tools are executable (.exe) or disk image (.dmg) files. Step-by-Step Downgrade Process 1. Disable Automatic Updates Downgrading the HP OfficeJet Pro 8620 firmware is
Steps:
