If USB method not available — using Embedded Web Server (EWS) / Network:
: You must find a specific older version (e.g., version 1400 series or earlier) from a trusted third-party archive or community forum, as the Official HP Support Site typically only provides the most recent version.
: Document your current printer configurations, as a firmware change may reset them. Disable Auto-Updates
HP typically prevents downgrading to older firmware versions (anti-rollback). However, the OfficeJet Pro 8620 is a legacy device (discontinued by HP in 2022). Recently, security researchers discovered a signature bypass in the bootloader of the 8620’s specific firmware revision. This allows a manual downgrade to version 1.7.4 (the last known “open” firmware) from any newer version, including the latest 2025 release . hp officejet pro 8620 firmware downgrade new
: If the tool says the update is "Not Applicable," right-click the .exe , extract it with 7-Zip , open EnterpriseDU.ini , and change VerifyDownloadID from 1 to 0 .
Modern inkjet printers are essentially small computers. When an over-the-air (OTA) or USB-connected firmware update is installed on your HP OfficeJet Pro 8620, it updates the printer’s security certificate database.
Downgrading printer firmware is not a manufacturer-supported procedure. It carries risks that every user should understand before proceeding: If USB method not available — using Embedded
A factory reset sometimes reverts the printer to a state where it may ignore certain cartridge locks, though it may not change the actual firmware version. CompAndSave On the control panel, go to Restore Factory Defaults and confirm by clicking
My setup
Downgrading reverts your printer's internal operating system to a date before the restrictive security patch was implemented, allowing your machine to communicate seamlessly with third-party chips again. Step 1: Gather Your Tools & Prepare the Printer However, the OfficeJet Pro 8620 is a legacy
If you have an older firmware file (typically a .exe for Windows or a .ful / .rfu file), follow these steps:
HP's official stance is that downgrading firmware on the OfficeJet Pro 8620 is not possible. In many official support forum responses, HP employees state: . This is because newer firmware often includes protections designed to prevent reverting to older, less restrictive versions.
Disable all antivirus software temporarily to prevent interference with the flashing tool.